[Remove Burr Tool] Quickly repairs damaged or flattened bolts and tightens nuts in place without hurting your hand. Fitment bolt tube size: 3mm to 20mm. [Industrial-Grade Materials] Made of extremely hard tungsten steel with high strength and hardness for durability, anti-rust, and anti-corrosion. Features three tungsten steel cutter blades with strong cutting and repairing capabilities, allowing burrs to be removed more cleanly and efficiently. [Safe & Efficient] This deburring external chamfering tool shaves down the outer edges of a flattened bolt. Simply attach it to a power drill and apply gentle pressure to the bolt head. Simplifies the repair process and eliminates the need to replace expensive or hard-to-find hardware. [Easy To Use] Insert into your drill chuck and use proper speeds and feeds—drill speed 0–400 RPM—with slight pressure to remove the burr. 1/4 inch hex with quick release design fits most drills including lithium-ion drills, hand drills, and table drills. [Widely Used] Use this deburring chamfering drill bit to repair various materials such as stainless steel, hardened steel, mild steel, brass, copper, aluminum, fiberglass, wood, and plastic. Simple design and compact size make it convenient to use and easy to carry in your toolbox. Color: Black Material: Tungsten Steel Size: 3–20mm Package Contents: 1 × Deburring External Chamfer Tool Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement allowance is +/- 1–3cm.