They have double cut head and meet USA standard with 1/4" (6.35mm) shank and 1/2" (12.7mm) head diameter.
Burrs are made with tungsten carbide and are suitable for deburring and polishing cast iron, cast steel, carbon steel, alloy steel, stainless steel and other materials up to HRC65 hardness.
Packaged in a clear plastic tube. 6" shank length, 7" total length.
US-BASED CUSTOMER SERVICE: Available by chat, email, phone, or visit us at our customer service center in La Crosse, WI.