Features:* .* , and practical.* Fits all 1/4" cordless screwdrivers.* High-speed replaceable composite cone, uses the principle of drill bit edge.* Drilling and tapping in one, one-step processing, greatly save processing steps and time cost, improve work efficiency.* Self-centering point, no need auxiliary center drilling or central punching.* High hardness, rust-proof, robust and . Specifications:Material: 45# SteelColor: As the picture shownSize: (optional) 2/3/4/5/6/8/10mm1/4" (6.35mm) Hex Shank: Package Included:5pcs Wood Drill BitPlease note:-Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!-Manual measurement, please allow 1-3cm error. Thank you for your understanding.