ITEM NAME:70mm Hold Hand Locks Lock Cylinder Brass Lock Core Red copper K3H9 70mm Hold Hand Locks Lock Cylinder Brass Lock Core Red copper K3H9 Solid brass body and plug For lock pick amateur or locksmith as a practice lock. Configuration three pure copper computer keys, mutual opening rate is 1/100000 The lock core material : copper Function purpose : indoor door lock Fit for doors with thickness of 35mm-45mm Package included: 1 x Practice Lock 1 x Screw 3 x Keys Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..The lock core material : copper. For lock pick amateur or locksmith as a practice lock. Solid brass body and plug. Function purpose : indoor door lock.