EBayDescription. 1. Uniform cutting teeth: the line of cutting teeth is uniformly processed by hand, high cutting efficiency. 2. Bearing steel material: GCR15 bearing steel material matrix has the characteristics of high hardness and toughness, hardness up to HRC60, wear-resistant and durable, not easy to deformation 3. Anti-slip handle: rubber coated anti-slip handle, surface particle treatment, anti-slip and comfortable, ergonomic design, comfortable to use 4. Surface hardening: surface hardening treatment to enhance the surface hardness, greatly improving the durability 5. A set of files can solve all kinds of trouble, and you can choose the width and style 6. Fine storage bag. Each set of files comes with a storage bag for easy storage 7. Superior performance: good heat dissipation, so that the surface of the workpiece will not overheat and become hot, discolored or leave residual glue when grinding Specification. Product name: diamond file Basic material: GCR15 bearing steel Optional specifications. 5Pcs Product advantages: high hardness, durable, not easy to wear Product size: 3*140mm  File specifications. A pack of 5, including flat files, semi-round files, triangular files, square files, round files, knife-shaped files Scope of application: jade grinding, wood carving grinding, ceramic grinding, metal grinding Scope of application. Grinding and polishing of various stainless steel / copper / iron / aluminum / plastic and other metal and non-metal materials, is a good accessory for surface grinding treatment Handle: plastic wrapping process