Feature:* Made of high carbon steel hardened and tempered for long life cutting power.* Various shapes: Ball, Circle, Flat Top Cone, Flame Cone, Round Cone Cylinder, Square Cylinder, Inverted Cone.* Use for grinding, polishing, shaping and burnishing of the wood surface, which process various precision mold cavities.* Suitable for low hardness of the workpiece, such as soft wood, plastic, rubber, etc. | Note: Not suitable for hardwood such as walnut, Bodhi root, oak etc. Specification:* Material: 45# carbon steel* Color: black* Shank: 1/8" (3mm)* Blade diameter: 6mm-8mm* Total Length: 40mm-45mm* Quantity: 10pcs Package include: 10 x 3mm Shank 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.