[SIZE]: Hex Shank Diameter: 1/4", Head Diameter: 20mm/0.79", Grinding Head Length: 39mm/1.54"
[MATERIALS]: The grinding head is made of premium aluminum oxide, which has high hardness toughness, and good stability, durable and wear resistance
[COMPATIBILITY]: The 1/4 inch hex shank can fit electric rotary tools, drill, electric grinder, crane pulverizer and pneumatic mill power tool
[USAGE]: Mainly used for metal molds, DIY polishing, inner hole polishing, rust removal, deburring, surface grinding, cutting tools, workpieces etc.
[APPLICATION]: Suitable for grinding and processing of medium and high tensile strength metal materials such as general carbon steel, alloy steel, malleable cast iron, hard bronze, woodworking etc.