Feature: 1. LIMIT ADJUSTABLE: With adjustable limit, the drill bit will not pierce wall and has premium punching efficiency, use at will! 2. ALLOY STEEL MATERIAL: Made of premium alloy steel material, this drill bit is wear resistant and impact resistant, ensures a long life span. 3. FAST CHIP REMOVAL: A spiral groove with a central drill bit will quickly discharge debris from the hole, effectively prevent the accumulation of retained rock cuttings and improve drilling efficiency. 4. WIDE APPLICATION: This drill bit is suitable for countersinking and drilling of wood, plastic, soft metal, fiberboard, aluminum alloy screws, etc. 5. EASY CARRYING: The drill bit set is light in weight and with a storage box, is easy carrying for convenient use. Specification: Item Type: Counterbore Drill Bit Material: Alloy Steel Color: Silver Specification: Approx. 3.2 x 10mm / 0.13 x 0.39in Application: Used for countersinking and tapping wood, plastic, soft metal, fiberboard, aluminum alloy screws, etc. Package List: 1 x Counterbore Drill Bit 1 x Wrench 1 x Hex Wrench 1 x Set Screw 1 x Storage Box