Features 5 PIECE LIMIT COUNTERSUNK DRILL: The set includes 5 replaceable HSS M2 taper drill bits measuring 4.8x12.7mm (3/16x1/2); 4.4x12.7mm (11/64x1/2); 4.0x9.5mm (5/32x3/8); 3.6x9.5mm (9/64x3/8) drill bit with 82° countersink, widely used for woodworking drilling ADJUSTABLE DEPTH BLOCKS: These countersunk drill bits feature adjustable depth limits that can be set to meet the varying depth requirements of countersunk and drilling tasks INCISIVE CARBIDE CUTTING EDGES: M2 high speed steel guide bit with spiral chute to ensure fast cutting; The incisive tungsten alloy cutting edges create fluent countersunk and countersunk holes, suitable for screws that fit the 82 degree imperial standard EFFICIENT AND TIME SAVING: The quick release hex shank design enables the drill to be drilled and screwdriver operated effortlessly without the need for additional tools, simplifying the process into one efficient step, saving you valuable time and improving your movement efficiency WIDE APPLICATION: The wood countersink drill bit set is suitable for bench drills, hand drills and conventional electric drills. Suitable for wood, fiberboard, particleboard, plywood, etc. Spec: Item Type: Woodworking Depth Stop Drill Set Material: Aluminum alloy body, 6542 cutter Size: 4.8x12.7mm (3/16x1/2), 4.4x12.7mm (11/64x1/2), 4.0x9.5mm (5/32x3/8), 3.6x9.5mm (9/64x3/8) Application: For hand drill, charging pile, bench drill, etc. Suitable: For drilling deep holes in hard wood, for drilling screw holes in wood, and sinking screw heads How to Use: Directly install and use Package List: 5 x Woodworking Depth Stop Drill 1 x Limiting Ring 1 x Wrench 1 x Storage Box Package List 5 x Woodworking Depth Stop Drill 1 x Limiting Ring 1 x Wrench 1 x Storage Box