Grit: *Number in Package: 1 *Product Type: Grinding Stone *Shank Diameter: 1/8 *Shape: Conical *Sub Brand: *Brand Name: Dremel *Diameter: 3/16 *Abrasive Material: Aluminum Oxide *Maximum Speed: 35000 *Overall Length: 1.5 *Point Length: 3/16 *Style: *Usage: Sharpening, Deburring, General Purpose Grinding Use on metals, castings, welded joints, rivets and rust *Specially designed for working with conic surfaces