High Material: Adopting high hardness tungsten steel material with black surface treatment. Application: The drill is suitable for 1/8‘- 3/4’ (3mm-19mm) round material, bar stock, threaded rods, screws, bolts, etc. It is compatible with most electric drills and bench drills for use. Use: Suitable for chamfering and deburring a wide range of materials such as stainless steel, iron, copper, carbon steel, plastics and aluminium. Easy to use: Quick-connect drill with hexagonal shank, burr removal with gentle pressure at low speeds. Warm Tip: If you receive a defective product or have any problems about item, please contact us, we will help you as soon as possible.