Foredom Carbide Miniature Set, Style AK210, 14 piece. Comes in a small round bur stand. These burs are ideal for use on hard wood and most metals including stainless steel, steel alloys, cast iron, etc. 2.35mm (3/32") shank. 1-3/4" overall length. 100000 RPM Max Speed. Made in USA. Includes bits 10224, 10227, 10228, 10231, 10233, 10234, 10232, 10229, 10221, 10222, 10223, 10225, 10226 and 10230.