ATOZTOOLS Countersink Drill Bit Set of 7pcs, Brad Point Drill Bits Woodworking Chamfering Counter Bits Wood Drill Set (Sizes in MM – 3, 4, 5, 6, 7, 8 & 10)

Turn the Allen wrench to adjust the length you need. Step 2: Insert countersunk bit into drill. Make sure the bit is clamped. Step 3: Drill the drill bit vertically. The depth only needs to allow the screw head to sink below the surface of the water. Warm reminder: - Correctly match the dimensions of the countertop sink to the screws used - Keep drill bit vertical when drilling - not suitable for steel plate, iron plate and other hard materials -When the drill is damaged, only the core hole device needs to be replaced; Then you can continue to use it