CRL Key Identification & Duplication

Question 1

Which manufacturer's residential locks commonly use the SC1 keyway?

Accepted Answer

Schlage

Answer

SC1 is the standard 5-pin residential keyway used by Schlage.

Question 2

On most pin tumbler keys, how are the cut positions numbered?

Accepted Answer

From the bow toward the tip

Answer

Position 1 is conventionally the cut closest to the bow (head) of the key.

Question 3

Which tool is used to measure the depth of existing cuts on a key?

Accepted Answer

Depth gauge or key caliper

Answer

A depth gauge or caliper measures cut depths so they can be matched to the manufacturer's depth chart.

Question 4

A key blank that is aligned in the duplicator vise by the very end of its blade is called:

Accepted Answer

Tip-stop

Answer

Tip-stop blanks are positioned against the end of the blade rather than the shoulder.

Question 5

What is the main purpose of a key blank cross-reference guide from Ilco or Silca?

Accepted Answer

Matching a key to the correct compatible blank

Answer

Cross-reference guides show which blanks from different brands fit the same keyway.

CRL - Certified Registered Locksmith Practice Test