[Remove Burr Tool] Quickly repairs / flatted bolts and tightens the nuts in place without hurting your hand, no sparks, and no burns; 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. Three Tungsten Steel cutter blades with strong cutting and repairing capabilities, allows burrs to be removed more cleanly and efficiently. [Safe & Efficient] This deburring external chamfering tool easily shaves down the outer edges of a flatted bolt. Simply attach it to a power drill, 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] Quickly slap it into your chuck drills, using proper speeds and feeds-Drill use 0-400 RPMs, and then slightly applying pressure to remove the burr. 1/4 inch hex shank with quick release design, fits most drills including Lithium-ion drills/hand drills/table drills. [Widely Used] Use this deburring chamfering drill bit to repair various metals, such as stainless steel, hardened steel, mild steel, brass, copper, aluminium, fibreglass and even wood or plastic. Simple design and a compact size, makes it quite convenient to use and easy for you to carry around with you in your toolbox. Colour:Black Material:Tungsten steel Size:3-20mm Package Contents: 2 x Deburring External Chamfer