Master Key Calculator

Master Key Calculator will help any locksmith or maintenance technician with the task of master keying most any cylinder. From Kwikset to Schlage, Yale to Arrow, 5, 6, even 7 pins. This calculator is able to assist the locksmith or maintenance technician in pinning up a cylinder for both the master key and the change key to operate the cylinder. Simply input the master key cuts on the top line and then the change key cuts on the second line. Now press the GO button and that It! Your bottom pins are displayed on the bottom row, and your master pins are displayed on the top row. There is no math for you to figure out. We have taken the mystery out of master keying for everyone! Used by novices and veteran locksmiths alike, this will enable you to get the job done fast.