It is a deburring external chamfer tool, made of stainless steel, easy to use and install, has a long service life. Quick exception of thorn, screw head grinding Angle, pipe trimming, etc.Can be polished with or without threads,suitable for all kinds of chuck electric drill.   Features: Quickly repair the damaged bolt and tighten the nut into place.  Simplify the repair process without replacing expensive or hard-to-find hardware.  Simple operation, using the lowest speed on the drill bit, and then applying a little pressure to remove the burrs.  Suitable for stainless steel, hardened steel, low carbon steel, copper, brass, aluminum, fiberglass, wood, plastic.  Made of stainless steel, high strength and hardness.  Easy to use and practical, saving more than 80% of the time.   Specifications: Material: Cr12MoV;  Color: Silver;  Total length: 50mm;  Handle length: 18mm;  Inner ring diameter: 22mm;  Outer ring diameter: 28mm;  Fit size: 8-32 bolts (.164) up to 3/4″-10 (.750) - (4mm-19mm);  Item weight: 58g /0.127g;  Package weight: 60g /0.13g;  Package size: 80 * 50 * 30mm /3.15 *1.97*1.18in;   Note: Due to the light and screen difference, the item's color may be slightly different from the pictures.  Please allow 1-3cm differences due to manual measurement.   Package list: 1*Silver triangle handle six slots;  1*Silver hexagonal handle six slots