The HD74/75 AccuReader is a 2-in-1 AccuReader set. Instead of offering two different AccuReaders to cover both code series (or opposite keyways), they are combined together for the price of one.
The HD74/75 AccuReader comes with 2 keys. One is designed to read any wafers in positions in HD74 locks and the other key is designed to read any wafers found in the HD75 locks.
The AccuReader works on the process of elimination to decipher the correct depths of the lock. By checking the deepest cut first you eliminate what the cuts are not. Therefore it is essential to always read the deepest possible depth first, in this case the #3 slide. Please take the time to familiarize yourself with the tools and verify all pieces are accounted for from the list of contents below: Package Contents: 1-HD74 AccuReader key 1-HD75 AccuReader key 1-insertion/release slide 1-HD74/75 depth slide #3 1-HD74/75 depth slide #2 1-Tube storage container 1-Tube Cap.