Features 5PCS FILES: Woodworking rotary file set, including 5 different specifications and shapes to meet different grinding and carving needs. DOUBLE CUT: These rotary files are double cut design, which can produce a finer finish and reduce the size of chips, and easy to control. 1/4IN SHANK: These files have standard 1/4in round shank, can be installed on a hand drill or electric grinder, compatible with most power tools. EXCELLENT METAL: The rotary file is made of tungsten steel alloy, with high hardness, abrasion resistance, strong penetration, and no bending. APPLICABLE RANGE: Suitable for grinding solid wood board, multilayer board, MDF board, density board, particle board, interlayer board, plastic, etc. Specification: Item Type: Rotary File Set Material: Tungsten Steel Alloy Applicable Material: Solid wood board, large core board, multi layer board, medium fiber board, particle board, density board, particle board, sandwich board, hardwood, cork, plastic, etc. Compatible Tool: Suitable for hand electric drills, lithium electric drills, and electric grinders Package List:5 x Rotary Files Package List 5 x Rotary Files