Feature: *Made of High-carbon steel tempered and hardened for long-life cutting power. *Assorted Shapes: Ball Wheel Flat Top Cone Tapered Flame Round Tapered Cylinder Cylinder Square Inverted Cone. *Used for grinding polishing shaping and burnishing wood surfaces which process out a various of high-precision mold cavity. *Suitable for low hardness of the workpiece such as soft wood plastic rubber etc.| Note: Not suitable for hard wood such as Walnut Bodhi root oak etc. Specification: *Material: 45# Carbon steel *Colour: Black *Shank: 1/8 (3mm) *Cutting Edge Diameter: 6mm-8mm *Total Length: 40mm-45mm *Quantity: 10pcs Package Includes: 10 x 3mm Shank Rotary File Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight manual measurement deviation for the data.