Feature: 1. APPLICABLE RANGE: The countersink drill bit can be used for countersinking and drilling of wood, plastic, soft metal and fiberboard, etc. 2. ALLOY STEEL: The limit drill bit is made of alloy steel, with high hardness, impact resistance, wear resistance, and long service life. 3. SPIRAL FLUTE: The spiral flute with central drill bit will quickly discharge debris from the hole, and effectively preventing clogging. 4. ADJUSTABLE LIMIT: With fine workmanship, this limit countersink drill bit has adjustable limit, reasonable structure, and stable operation. 5. OTHER TOOLS: Equipped with flat wrench, hexwrench and machine screw, the countersink drill is easy to operate, with high efficiency. Specification: Item Type: Limit Taper Drill Material: Alloy Steel Color: Silver Specification: 2.8 x 8mm Use: For countersinking and tapping wood, plastic, soft metal, fiberboard, aluminum alloy screws, etc.. Package List: 1 x Limit Taper Drill1 x Wrench1 x Hex Wrench1 x Machine Screw1 x Storage Box