ITEM NAME:4pcs HSS Hex Countersink Drill Bit & Quick Change Screw Wrench 6# 8# 10# 12# Set Product Description: Name: Titanium-plated 1/4 hex shank tapered hole drill Counterbore drill Woodworking countersunk drill Upper screw reaming drill. Handle: 1/4 hex shank. Material: High speed steel 4241 (suitable for workpieces with hardness below 25HRC, such as carbon steel, thin iron plate, insulation board, PVC board, wood board, etc.). Black chamfering material is 45 steel specification: Chamferer Corresponding drill size 6# 2.38mm 8# 2.78mm 10# 3.175mm 12# 3.56mm Hex shank diameter is 6.35mm Function: You can drill the screw hole and the counterbore that accommodates the screw cap at the same time and keep the two on the same axis. After screwing the screw, the screw cap is below the plane of the board! Suitable for drilling machines with collets or joints, suitable for drilling holes in hard wood and wood . Package Include: According to your Choose!.After screwing the screw, the screw cap is below the plane of the board! Handle: 1/4 hex shank. Chamferer Corresponding drill size. Material: High speed steel 4241 (suitable for workpieces with hardness below 25HRC, such as carbon steel, thin iron plate, insulation board, PVC board, wood board, etc.).
