• # How to Open a Simplex Lock

Simplex locks, now manufactured by Kaba Ilco, are simple push-button combination locks.

Simplex locks are used to protect equipment rooms, labs, and FedEx-type boxes. Simplex locks are used whenever having a large number of keys would create logistical problems.

## Simplex Lock Combinations

The Simplex lock would be a normal 5-button combination lock, except for one weakness. Each button on a Simplex lock may only be used once in a combination. A combination of 1-4-3-2 is acceptable. A combination of 1-4-3-1 will not work.

This limits the Simplex lock to only 1,084 possible combinations.

Simplex locks do support half-presses, where you only push the button half-way in. This doubles the number of possible combinations to 2,162. These half-presses are difficult to remember and difficult to use. Because of this, they are seldom utilized.

## Opening a Simplex Lock

How do you open a Simplex lock? You try all 1,082 possible combinations. It may seem difficult at first, but with some practice you should be able to open most Simplex locks in under ten minutes.

This handy chart of Simplex Lock combinations will help you to open any Simplex lock you need to.

With practice, you will be able to open any Simplex Lock in about 10 minutes.

1

1 2

1 2 3

1 2 3 4

1 2 3 4 5

1 2 3 4&5

1 2 3 5

1 2 3 5 4

1 2 3&4

1 2 3&4 5

1 2 3&4&5

1 2 3&5

1 2 3&5 4

1 2 4

1 2 4 3

1 2 4 3 5

1 2 4 3&5

1 2 4 5

1 2 4 5 3

1 2 4&5

1 2 4&5 3

1 2 5

1 2 5 3

1 2 5 3 4

1 2 5 3&4

1 2 5 4

1 2 5 4 3

1 2&3

1 2&3 4

1 2&3 4 5

1 2&3 4&5

1 2&3 5

1 2&3 5 4

1 2&3&4

1 2&3&4 5

1 2&3&4&5

1 2&3&5

1 2&3&5 4

1 2&4

1 2&4 3

1 2&4 3 5

1 2&4 3&5

1 2&4 5

1 2&4 5 3

1 2&4&5

1 2&4&5 3

1 2&5

1 2&5 3

1 2&5 3 4

1 2&5 3&4

1 2&5 4

1 2&5 4 3

1 3

1 3 2

1 3 2 4

1 3 2 4 5

1 3 2 4&5

1 3 2 5

1 3 2 5 4

1 3 2&4

1 3 2&4 5

1 3 2&4&5

1 3 2&5

1 3 2&5 4

1 3 4

1 3 4 2

1 3 4 2 5

1 3 4 2&5

1 3 4 5

1 3 4 5 2

1 3 4&5

1 3 4&5 2

1 3 5

1 3 5 2

1 3 5 2 4

1 3 5 2&4

1 3 5 4

1 3 5 4 2

1 3&4

1 3&4 2

1 3&4 2 5

1 3&4 2&5

1 3&4 5

1 3&4 5 2

1 3&4&5

1 3&4&5 2

1 3&5

1 3&5 2

1 3&5 2 4

1 3&5 2&4

1 3&5 4

1 3&5 4 2

1 4

1 4 2

1 4 2 3

1 4 2 3 5

1 4 2 3&5

1 4 2 5

1 4 2 5 3

1 4 2&3

1 4 2&3 5

1 4 2&3&5

1 4 2&5

1 4 2&5 3

1 4 3

1 4 3 2

1 4 3 2 5

1 4 3 2&5

1 4 3 5

1 4 3 5 2

1 4 3&5

1 4 3&5 2

1 4 5

1 4 5 2

1 4 5 2 3

1 4 5 2&3

1 4 5 3

1 4 5 3 2

1 4&5

1 4&5 2

1 4&5 2 3

1 4&5 2&3

1 4&5 3

1 4&5 3 2

1 5

1 5 2

1 5 2 3

1 5 2 3 4

1 5 2 3&4

1 5 2 4

1 5 2 4 3

1 5 2&3

1 5 2&3 4

1 5 2&3&4

1 5 2&4

1 5 2&4 3

1 5 3

1 5 3 2

1 5 3 2 4

1 5 3 2&4

1 5 3 4

1 5 3 4 2

1 5 3&4

1 5 3&4 2

1 5 4

1 5 4 2

1 5 4 2 3

1 5 4 2&3

1 5 4 3

1 5 4 3 2

1&2

1&2 3

1&2 3 4

1&2 3 4 5

1&2 3 4&5

1&2 3 5

1&2 3 5 4

1&2 3&4

1&2 3&4 5

1&2 3&4&5

1&2 3&5

1&2 3&5 4

1&2 4

1&2 4 3

1&2 4 3 5

1&2 4 3&5

1&2 4 5

1&2 4 5 3

1&2 4&5

1&2 4&5 3

1&2 5

1&2 5 3

1&2 5 3 4

1&2 5 3&4

1&2 5 4

1&2 5 4 3

1&2&3

1&2&3 4

1&2&3 4 5

1&2&3 4&5

1&2&3 5

1&2&3 5 4

1&2&3&4

1&2&3&4 5

1&2&3&4&5

1&2&3&5

1&2&3&5 4

1&2&4

1&2&4 3

1&2&4 3 5

1&2&4 3&5

1&2&4 5

1&2&4 5 3

1&2&4&5

1&2&4&5 3

1&2&5

1&2&5 3

1&2&5 3 4

1&2&5 3&4

1&2&5 4

1&2&5 4 3

1&3

1&3 2

1&3 2 4

1&3 2 4 5

1&3 2 4&5

1&3 2 5

1&3 2 5 4

1&3 2&4

1&3 2&4 5

1&3 2&4&5

1&3 2&5

1&3 2&5 4

1&3 4

1&3 4 2

1&3 4 2 5

1&3 4 2&5

1&3 4 5

1&3 4 5 2

1&3 4&5

1&3 4&5 2

1&3 5

1&3 5 2

1&3 5 2 4

1&3 5 2&4

1&3 5 4

1&3 5 4 2

1&3&4

1&3&4 2

1&3&4 2 5

1&3&4 2&5

1&3&4 5

1&3&4 5 2

1&3&4&5

1&3&4&5 2

1&3&5

1&3&5 2

1&3&5 2 4

1&3&5 2&4

1&3&5 4

1&3&5 4 2

1&4

1&4 2

1&4 2 3

1&4 2 3 5

1&4 2 3&5

1&4 2 5

1&4 2 5 3

1&4 2&3

1&4 2&3 5

1&4 2&3&5

1&4 2&5

1&4 2&5 3

1&4 3

1&4 3 2

1&4 3 2 5

1&4 3 2&5

1&4 3 5

1&4 3 5 2

1&4 3&5

1&4 3&5 2

1&4 5

1&4 5 2

1&4 5 2 3

1&4 5 2&3

1&4 5 3

1&4 5 3 2

1&4&5

1&4&5 2

1&4&5 2 3

1&4&5 2&3

1&4&5 3

1&4&5 3 2

1&5

1&5 2

1&5 2 3

1&5 2 3 4

1&5 2 3&4

1&5 2 4

1&5 2 4 3

1&5 2&3

1&5 2&3 4

1&5 2&3&4

1&5 2&4

1&5 2&4 3

1&5 3

1&5 3 2

1&5 3 2 4

1&5 3 2&4

1&5 3 4

1&5 3 4 2

1&5 3&4

1&5 3&4 2

1&5 4

1&5 4 2

1&5 4 2 3

1&5 4 2&3

1&5 4 3

1&5 4 3 2

2

2 1

2 1 3

2 1 3 4

2 1 3 4 5

2 1 3 4&5

2 1 3 5

2 1 3 5 4

2 1 3&4

2 1 3&4 5

2 1 3&4&5

2 1 3&5

2 1 3&5 4

2 1 4

2 1 4 3

2 1 4 3 5

2 1 4 3&5

2 1 4 5

2 1 4 5 3

2 1 4&5

2 1 4&5 3

2 1 5

2 1 5 3

2 1 5 3 4

2 1 5 3&4

2 1 5 4

2 1 5 4 3

2 1&3

2 1&3 4

2 1&3 4 5

2 1&3 4&5

2 1&3 5

2 1&3 5 4

2 1&3&4

2 1&3&4 5

2 1&3&4&5

2 1&3&5

2 1&3&5 4

2 1&4

2 1&4 3

2 1&4 3 5

2 1&4 3&5

2 1&4 5

2 1&4 5 3

2 1&4&5

2 1&4&5 3

2 1&5

2 1&5 3

2 1&5 3 4

2 1&5 3&4

2 1&5 4

2 1&5 4 3

2 3

2 3 1

2 3 1 4

2 3 1 4 5

2 3 1 4&5

2 3 1 5

2 3 1 5 4

2 3 1&4

2 3 1&4 5

2 3 1&4&5

2 3 1&5

2 3 1&5 4

2 3 4

2 3 4 1

2 3 4 1 5

2 3 4 1&5

2 3 4 5

2 3 4 5 1

2 3 4&5

2 3 4&5 1

2 3 5

2 3 5 1

2 3 5 1 4

2 3 5 1&4

2 3 5 4

2 3 5 4 1

2 3&4

2 3&4 1

2 3&4 1 5

2 3&4 1&5

2 3&4 5

2 3&4 5 1

2 3&4&5

2 3&4&5 1

2 3&5

2 3&5 1

2 3&5 1 4

2 3&5 1&4

2 3&5 4

2 3&5 4 1

2 4

2 4 1

2 4 1 3

2 4 1 3 5

2 4 1 3&5

2 4 1 5

2 4 1 5 3

2 4 1&3

2 4 1&3 5

2 4 1&3&5

2 4 1&5

2 4 1&5 3

2 4 3

2 4 3 1

2 4 3 1 5

2 4 3 1&5

2 4 3 5

2 4 3 5 1

2 4 3&5

2 4 3&5 1

2 4 5

2 4 5 1

2 4 5 1 3

2 4 5 1&3

2 4 5 3

2 4 5 3 1

2 4&5

2 4&5 1

2 4&5 1 3

2 4&5 1&3

2 4&5 3

2 4&5 3 1

2 5

2 5 1

2 5 1 3

2 5 1 3 4

2 5 1 3&4

2 5 1 4

2 5 1 4 3

2 5 1&3

2 5 1&3 4

2 5 1&3&4

2 5 1&4

2 5 1&4 3

2 5 3

2 5 3 1

2 5 3 1 4

2 5 3 1&4

2 5 3 4

2 5 3 4 1

2 5 3&4

2 5 3&4 1

2 5 4

2 5 4 1

2 5 4 1 3

2 5 4 1&3

2 5 4 3

2 5 4 3 1

2&3

2&3 1

2&3 1 4

2&3 1 4 5

2&3 1 4&5

2&3 1 5

2&3 1 5 4

2&3 1&4

2&3 1&4 5

2&3 1&4&5

2&3 1&5

2&3 1&5 4

2&3 4

2&3 4 1

2&3 4 1 5

2&3 4 1&5

2&3 4 5

2&3 4 5 1

2&3 4&5

2&3 4&5 1

2&3 5

2&3 5 1

2&3 5 1 4

2&3 5 1&4

2&3 5 4

2&3 5 4 1

2&3&4

2&3&4 1

2&3&4 1 5

2&3&4 1&5

2&3&4 5

2&3&4 5 1

2&3&4&5

2&3&4&5 1

2&3&5

2&3&5 1

2&3&5 1 4

2&3&5 1&4

2&3&5 4

2&3&5 4 1

2&4

2&4 1

2&4 1 3

2&4 1 3 5

2&4 1 3&5

2&4 1 5

2&4 1 5 3

2&4 1&3

2&4 1&3 5

2&4 1&3&5

2&4 1&5

2&4 1&5 3

2&4 3

2&4 3 1

2&4 3 1 5

2&4 3 1&5

2&4 3 5

2&4 3 5 1

2&4 3&5

2&4 3&5 1

2&4 5

2&4 5 1

2&4 5 1 3

2&4 5 1&3

2&4 5 3

2&4 5 3 1

2&4&5

2&4&5 1

2&4&5 1 3

2&4&5 1&3

2&4&5 3

2&4&5 3 1

2&5

2&5 1

2&5 1 3

2&5 1 3 4

2&5 1 3&4

2&5 1 4

2&5 1 4 3

2&5 1&3

2&5 1&3 4

2&5 1&3&4

2&5 1&4

2&5 1&4 3

2&5 3

2&5 3 1

2&5 3 1 4

2&5 3 1&4

2&5 3 4

2&5 3 4 1

2&5 3&4

2&5 3&4 1

2&5 4

2&5 4 1

2&5 4 1 3

2&5 4 1&3

2&5 4 3

2&5 4 3 1

3

3 1

3 1 2

3 1 2 4

3 1 2 4 5

3 1 2 4&5

3 1 2 5

3 1 2 5 4

3 1 2&4

3 1 2&4 5

3 1 2&4&5

3 1 2&5

3 1 2&5 4

3 1 4

3 1 4 2

3 1 4 2 5

3 1 4 2&5

3 1 4 5

3 1 4 5 2

3 1 4&5

3 1 4&5 2

3 1 5

3 1 5 2

3 1 5 2 4

3 1 5 2&4

3 1 5 4

3 1 5 4 2

3 1&2

3 1&2 4

3 1&2 4 5

3 1&2 4&5

3 1&2 5

3 1&2 5 4

3 1&2&4

3 1&2&4 5

3 1&2&4&5

3 1&2&5

3 1&2&5 4

3 1&4

3 1&4 2

3 1&4 2 5

3 1&4 2&5

3 1&4 5

3 1&4 5 2

3 1&4&5

3 1&4&5 2

3 1&5

3 1&5 2

3 1&5 2 4

3 1&5 2&4

3 1&5 4

3 1&5 4 2

3 2

3 2 1

3 2 1 4

3 2 1 4 5

3 2 1 4&5

3 2 1 5

3 2 1 5 4

3 2 1&4

3 2 1&4 5

3 2 1&4&5

3 2 1&5

3 2 1&5 4

3 2 4

3 2 4 1

3 2 4 1 5

3 2 4 1&5

3 2 4 5

3 2 4 5 1

3 2 4&5

3 2 4&5 1

3 2 5

3 2 5 1

3 2 5 1 4

3 2 5 1&4

3 2 5 4

3 2 5 4 1

3 2&4

3 2&4 1

3 2&4 1 5

3 2&4 1&5

3 2&4 5

3 2&4 5 1

3 2&4&5

3 2&4&5 1

3 2&5

3 2&5 1

3 2&5 1 4

3 2&5 1&4

3 2&5 4

3 2&5 4 1

3 4

3 4 1

3 4 1 2

3 4 1 2 5

3 4 1 2&5

3 4 1 5

3 4 1 5 2

3 4 1&2

3 4 1&2 5

3 4 1&2&5

3 4 1&5

3 4 1&5 2

3 4 2

3 4 2 1

3 4 2 1 5

3 4 2 1&5

3 4 2 5

3 4 2 5 1

3 4 2&5

3 4 2&5 1

3 4 5

3 4 5 1

3 4 5 1 2

3 4 5 1&2

3 4 5 2

3 4 5 2 1

3 4&5

3 4&5 1

3 4&5 1 2

3 4&5 1&2

3 4&5 2

3 4&5 2 1

3 5

3 5 1

3 5 1 2

3 5 1 2 4

3 5 1 2&4

3 5 1 4

3 5 1 4 2

3 5 1&2

3 5 1&2 4

3 5 1&2&4

3 5 1&4

3 5 1&4 2

3 5 2

3 5 2 1

3 5 2 1 4

3 5 2 1&4

3 5 2 4

3 5 2 4 1

3 5 2&4

3 5 2&4 1

3 5 4

3 5 4 1

3 5 4 1 2

3 5 4 1&2

3 5 4 2

3 5 4 2 1

3&4

3&4 1

3&4 1 2

3&4 1 2 5

3&4 1 2&5

3&4 1 5

3&4 1 5 2

3&4 1&2

3&4 1&2 5

3&4 1&2&5

3&4 1&5

3&4 1&5 2

3&4 2

3&4 2 1

3&4 2 1 5

3&4 2 1&5

3&4 2 5

3&4 2 5 1

3&4 2&5

3&4 2&5 1

3&4 5

3&4 5 1

3&4 5 1 2

3&4 5 1&2

3&4 5 2

3&4 5 2 1

3&4&5

3&4&5 1

3&4&5 1 2

3&4&5 1&2

3&4&5 2

3&4&5 2 1

3&5

3&5 1

3&5 1 2

3&5 1 2 4

3&5 1 2&4

3&5 1 4

3&5 1 4 2

3&5 1&2

3&5 1&2 4

3&5 1&2&4

3&5 1&4

3&5 1&4 2

3&5 2

3&5 2 1

3&5 2 1 4

3&5 2 1&4

3&5 2 4

3&5 2 4 1

3&5 2&4

3&5 2&4 1

3&5 4

3&5 4 1

3&5 4 1 2

3&5 4 1&2

3&5 4 2

3&5 4 2 1

4

4 1

4 1 2

4 1 2 3

4 1 2 3 5

4 1 2 3&5

4 1 2 5

4 1 2 5 3

4 1 2&3

4 1 2&3 5

4 1 2&3&5

4 1 2&5

4 1 2&5 3

4 1 3

4 1 3 2

4 1 3 2 5

4 1 3 2&5

4 1 3 5

4 1 3 5 2

4 1 3&5

4 1 3&5 2

4 1 5

4 1 5 2

4 1 5 2 3

4 1 5 2&3

4 1 5 3

4 1 5 3 2

4 1&2

4 1&2 3

4 1&2 3 5

4 1&2 3&5

4 1&2 5

4 1&2 5 3

4 1&2&3

4 1&2&3 5

4 1&2&3&5

4 1&2&5

4 1&2&5 3

4 1&3

4 1&3 2

4 1&3 2 5

4 1&3 2&5

4 1&3 5

4 1&3 5 2

4 1&3&5

4 1&3&5 2

4 1&5

4 1&5 2

4 1&5 2 3

4 1&5 2&3

4 1&5 3

4 1&5 3 2

4 2

4 2 1

4 2 1 3

4 2 1 3 5

4 2 1 3&5

4 2 1 5

4 2 1 5 3

4 2 1&3

4 2 1&3 5

4 2 1&3&5

4 2 1&5

4 2 1&5 3

4 2 3

4 2 3 1

4 2 3 1 5

4 2 3 1&5

4 2 3 5

4 2 3 5 1

4 2 3&5

4 2 3&5 1

4 2 5

4 2 5 1

4 2 5 1 3

4 2 5 1&3

4 2 5 3

4 2 5 3 1

4 2&3

4 2&3 1

4 2&3 1 5

4 2&3 1&5

4 2&3 5

4 2&3 5 1

4 2&3&5

4 2&3&5 1

4 2&5

4 2&5 1

4 2&5 1 3

4 2&5 1&3

4 2&5 3

4 2&5 3 1

4 3

4 3 1

4 3 1 2

4 3 1 2 5

4 3 1 2&5

4 3 1 5

4 3 1 5 2

4 3 1&2

4 3 1&2 5

4 3 1&2&5

4 3 1&5

4 3 1&5 2

4 3 2

4 3 2 1

4 3 2 1 5

4 3 2 1&5

4 3 2 5

4 3 2 5 1

4 3 2&5

4 3 2&5 1

4 3 5

4 3 5 1

4 3 5 1 2

4 3 5 1&2

4 3 5 2

4 3 5 2 1

4 3&5

4 3&5 1

4 3&5 1 2

4 3&5 1&2

4 3&5 2

4 3&5 2 1

4 5

4 5 1

4 5 1 2

4 5 1 2 3

4 5 1 2&3

4 5 1 3

4 5 1 3 2

4 5 1&2

4 5 1&2 3

4 5 1&2&3

4 5 1&3

4 5 1&3 2

4 5 2

4 5 2 1

4 5 2 1 3

4 5 2 1&3

4 5 2 3

4 5 2 3 1

4 5 2&3

4 5 2&3 1

4 5 3

4 5 3 1

4 5 3 1 2

4 5 3 1&2

4 5 3 2

4 5 3 2 1

4&5

4&5 1

4&5 1 2

4&5 1 2 3

4&5 1 2&3

4&5 1 3

4&5 1 3 2

4&5 1&2

4&5 1&2 3

4&5 1&2&3

4&5 1&3

4&5 1&3 2

4&5 2

4&5 2 1

4&5 2 1 3

4&5 2 1&3

4&5 2 3

4&5 2 3 1

4&5 2&3

4&5 2&3 1

4&5 3

4&5 3 1

4&5 3 1 2

4&5 3 1&2

4&5 3 2

4&5 3 2 1

5

5 1

5 1 2

5 1 2 3

5 1 2 3 4

5 1 2 3&4

5 1 2 4

5 1 2 4 3

5 1 2&3

5 1 2&3 4

5 1 2&3&4

5 1 2&4

5 1 2&4 3

5 1 3

5 1 3 2

5 1 3 2 4

5 1 3 2&4

5 1 3 4

5 1 3 4 2

5 1 3&4

5 1 3&4 2

5 1 4

5 1 4 2

5 1 4 2 3

5 1 4 2&3

5 1 4 3

5 1 4 3 2

5 1&2

5 1&2 3

5 1&2 3 4

5 1&2 3&4

5 1&2 4

5 1&2 4 3

5 1&2&3

5 1&2&3 4

5 1&2&3&4

5 1&2&4

5 1&2&4 3

5 1&3

5 1&3 2

5 1&3 2 4

5 1&3 2&4

5 1&3 4

5 1&3 4 2

5 1&3&4

5 1&3&4 2

5 1&4

5 1&4 2

5 1&4 2 3

5 1&4 2&3

5 1&4 3

5 1&4 3 2

5 2

5 2 1

5 2 1 3

5 2 1 3 4

5 2 1 3&4

5 2 1 4

5 2 1 4 3

5 2 1&3

5 2 1&3 4

5 2 1&3&4

5 2 1&4

5 2 1&4 3

5 2 3

5 2 3 1

5 2 3 1 4

5 2 3 1&4

5 2 3 4

5 2 3 4 1

5 2 3&4

5 2 3&4 1

5 2 4

5 2 4 1

5 2 4 1 3

5 2 4 1&3

5 2 4 3

5 2 4 3 1

5 2&3

5 2&3 1

5 2&3 1 4

5 2&3 1&4

5 2&3 4

5 2&3 4 1

5 2&3&4

5 2&3&4 1

5 2&4

5 2&4 1

5 2&4 1 3

5 2&4 1&3

5 2&4 3

5 2&4 3 1

5 3

5 3 1

5 3 1 2

5 3 1 2 4

5 3 1 2&4

5 3 1 4

5 3 1 4 2

5 3 1&2

5 3 1&2 4

5 3 1&2&4

5 3 1&4

5 3 1&4 2

5 3 2

5 3 2 1

5 3 2 1 4

5 3 2 1&4

5 3 2 4

5 3 2 4 1

5 3 2&4

5 3 2&4 1

5 3 4

5 3 4 1

5 3 4 1 2

5 3 4 1&2

5 3 4 2

5 3 4 2 1

5 3&4

5 3&4 1

5 3&4 1 2

5 3&4 1&2

5 3&4 2

5 3&4 2 1

5 4

5 4 1

5 4 1 2

5 4 1 2 3

5 4 1 2&3

5 4 1 3

5 4 1 3 2

5 4 1&2

5 4 1&2 3

5 4 1&2&3

5 4 1&3

5 4 1&3 2

5 4 2

5 4 2 1

5 4 2 1 3

5 4 2 1&3

5 4 2 3

5 4 2 3 1

5 4 2&3

5 4 2&3 1

5 4 3

5 4 3 1

5 4 3 1 2

5 4 3 1&2

5 4 3 2

5 4 3 2 1

1. #### Coco

1 July, 2019 at 6:00 pm

Wow, what an exhausting list… and apparently incomplete. tried every combination listed (actually only 1,081) and it didn’t work… my luck, it is one of the three (3) that are missing if there are truly 1,084.

2. #### lee

28 January, 2012 at 6:02 pm

I purchased a simplex gun safe several years ago and I have lost the factory settings.  Can you tell me the setting or someone who can?

Thanks,

Lee

• #### A.J.

17 October, 2017 at 1:01 am

Surprised no one answered this. I also have a gun safe with a simplex lock, inherited recently. Of course the combination was nowhere to be found, but I was lucky enough to have what seems to be all of the original factory documentation. The factory-preset combination is contained in the list above. That’s as much as I think anyone should say on the subject.

• #### Rhonda

20 December, 2017 at 3:22 pm

I have a similar situation but not lucky enough to find the factory paperwork. Can you help me narrow the list by giving me the section it is in? For instance, it begins with a “3” or it does/does not have the “&” symbol. Also, do you know how to do the “&” symbol with the code buttons?

Thank you!