70MM 32.5/37.5 Brass Key Cylinder Door Lock Barrel Anti Snap/Bump + 7 keys

描述

"A" and "C" keys only for home owner, "B" keys only for the qualified installation person "C" KEY CAN NOT BE USED BEFORE KEY CYLINDER INSTALLED WELL After installation finished, the home owner puts the "C" key into the door and turns 360 degrees, then the "B" keys will be disabled; "A" and "C" keys are used normally Can not use any kind of lubricating oil, in particular cases, you could use a little industrial white wax or pencil powder