Features: 1. Premium Material: Rotary file is made of cemented carbide material, heat resistant, high strength, not easy to deform, sturdy and durable. 2. Excellent Performance: Professionally manufactured with exquisite workmanship, high efficiency, stable performance, and high reliability. 3. Size: Carbide burr with 6mm shank, cutter head diameter approximately 6mm, 8mm, 10mm, 12mm, 14mm. 4. Easy Operation: Easy to use; single cut burr compatible with handheld electric or pneumatic tools for convenient and practical operation. 5. Wide Application: Suitable for surface grinding in aviation, automotive, and marine industries. Specification: Item Type: Carbide Burrs Set Material: Cemented Carbide Color: Silver Kits include: A0616M06, A0820M06, A1020M06, A1225M06, A1425M06 A0616M06: Shank diameter approximately 6mm, cutter head diameter approximately 6mm A0820M06: Shank diameter approximately 6mm, cutter head diameter approximately 8mm A1020M06: Shank diameter approximately 6mm, cutter head diameter approximately 10mm A1225M06: Shank diameter approximately 6mm, cutter head diameter approximately 12mm A1425M06: Shank diameter approximately 6mm, cutter head diameter approximately 14mm Application: Suitable for surface grinding in aviation, automotive, and marine applications.