About this item High quality: High quality high speed steel woodworking drill bits 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 bits are available for handling wood, non-ferrous metals, plastic and rubber, soft materials, etc.< /p > Use: rotary drill bits are available for handling wood, non-ferrous metals, plastic and rubber, soft materials, etc. Contents: 5 shapes: ball, oval, cylindrical, 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 . Colour: Gray Handle diameter: Approximately 0.63 mm. Length: As the picture. Quantity: 5 pieces. Scope: Used for grinding, polishing, removing surfaces and corrosion. Contents: Set of 5 rotary cutters.