High-quality Carbon SteelThe wood plug cutter set is made of carbon steel,durable and corrosion resistant,high precision,high strength and smooth surface. Multiple SizesThe wood plug cutter set contains two shapes,each shaped has four sizes,1/4(wood plug 6mm),3/8(wood plug 10mm),1/2(wood plug 13mm),5/8(wood plug 16mm).Shank Diameter:approx.10mm. FunctionWhen making furniture,we usually needs to use screws and nails in visible area ,the set is useful to remove old nails and screws from furniture and floor. Widely UseThis is very good drill tool,flexible and easy to operate, can be used for working to make holes and take round corks.suitable for hand and bench drills,If you want better effect,we recommend using it with a bench drill. Package IncludeThis set includes 4pcs tapered drill bits and 4pcs claw drill bits to meet your daily work needs. The speed should not be too fast, it is easy to produce smoke, burnt and so on