About This Item High Quality: Woodworking bits made of premium high speed steel for high hardness, high abrasion resistance and high heat resistance. 1/4 shank size is suitable for most electric and cordless drills Main Function: Rotary woodworking drill bits are available for handling wood, non-metals ferrous, plastic and rubber, soft materials, etc Usage: rotary drill bits are available for handling wood, non-ferrous metals, plastic and rubber, soft materials, etc Contents: 5 shapes: ball, oval, cylinder, large cone, small cone. 6mm shank suitable for most electric and cordless drills Convenient control: simple rotary file, safe and reliable, no dust pollution, improve the working environment Features: Material: Steel. Color: Gray Handle diameter: Approx. 0.63mm. Length: As pictured. Quantity : 5 pieces. Scope of application: Used for grinding, polishing, surface removal and corrosion. Contents: Pack of 5 rotary cutters.