steel alloy cutter head is wear- and . The special cutter head for slotting wooden door locks is and cuts smoothly. It is simple and convenient to use and has a long service life. Fast slotting speed, blade, beautiful slotting shape, thread spiral design, effectively removes residues at the bottom of the hole or slot, and improves work efficiency and processing quality. Suitable for hole opening machine, slotting machine, wooden door unlocking, fingerprint lock opening, hard solid wood, mahogany, plastic, pressed board, density board, plywood and other wooden materials. How to choose the right size: Measure the thickness of the lock shell in the lock body and select the corresponding cutter head for slotting. Cut to the depth that can put the lock into the door. Select the corresponding size of the guide plate thickness. Cut the thickness of the guide plate on the door to put the lock in., Weight: 0.55225796631 pounds, Manufacturer: Aboiled