Features ADJUSTABLE LIMIT: The countersink chamfer drill bit has adjustable limit to meet various countersinking and hole drilling requirements. FAST CHIP REMOVAL: The spiral flute with central bit helps to quickly remove chips, effectively preventing chip clogging and accumulation. METAL MATERIAL: The taper drill bit is made of excellent alloy steel, with high hardness, strong wear resistance, and long service life. EASY OPERATION: With fine workmanship, this limit countersink drill bit has high accuracy, with wrenches and screw, easy to operate. WIDE APPLICATION: Can be used for drilling wood, plastic, soft metal, fiberboard, aluminum alloy screws and other material, simple and practical. Specification: Item Type: Countersink Drill Bit Material: Alloy Steel Color: Silver Specification: 3.0 x 8mm Use: For countersinking and tapping wood, plastic, soft metal, fiberboard, aluminum alloy screws, etc. Package List:1 x Countersink Drill Bit1 x Wrench1 x Hex Wrench1 x Machine Screw1 x Storage Box Package List 1 x Countersink Drill Bit 1 x Wrench 1 x Hex Wrench 1 x Machine Screw 1 x Storage Box