5 Pack 8mm Countersink Drill Bits Woodworking Countersink Bits Material Aluminum Silver Finish Type Shaft Geometry spiral tool Recommended surface plastic, wood, metal about this item Package contains: 5 drill bits, 5 hex keys and 5 screws. Different sizes of drill bits can meet your different needs. Size : 2.88mm, 3.08mm, 3.28mm, 3.58mm, 4.08mm. High Quality: Made of high quality alloy steel high quality, it has higher precision, higher hardness, faster cutting speed and stronger resistance than ordinary drill bits. Removable and adjustable: use the included hex wrench to remove the screws and adjust the length of the countersunk holes to adjust the drilling length for different screw lengths. Practical function: The spiral flute with the center drill quickly clears the chips in the hole. It can effectively prevent the accumulation of cuttings and improve drilling efficiency. Wide range of applications: suitable for drilling wood materials, it is an ideal drill bit for solid board, particle board, plywood, MDF. Also suitable for plastics, soft metals, fibreboard etc. Product description Specification: Drilling material: high speed steel< /p> Blade Material: Tungsten Steel Color: Silver + Orange Shank Type: Round Shank Diameter: 8mm Stem Diameter: 8mm Dimensions: (center drill diameter counterbore diameter) - 2.8 x 8mm - 3.0 x 8mm - 3, 2 x 8mm - 3.5 x 8mm - 4.0 x 8mm Package includes: 5 countersink positions 5 countersunk countersunk screws for woodworking, screws