High Quality: Wood drill 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: woodworking rotary drill bits are available for handling wood, non-ferrous metals, plastics and rubber, soft materials, etcUse: rotary drills 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.Specifications:Material:Steel.Color:GreyHandle diameter :Approximately 0.63mm.Length:As the picture shows.Quantity:5 pieces.Scope of application:Used for grinding, polishing, surface removal and corrosion.Contents:Pack of 5 rotary burrs.