1PREMIUM MATERIAL: The tool is made of carbide blades, incisive and durable, slick chamfering, large discharge holes provide cleaner and smoother cut 2HIGH EFFICIENCY: High strength, high hardness deburring external chamfering tools can easily shave the outer edges of screws, tubes or bars to remove burrs. 3APPLICABLE MATERIALS: Deburring chamfer tool is suitable for hardened steel, mild steel, copper, brass, wood, fiberglass and hard plastics. Can be used on certain stainless steel screws. 4WIDELY USED: Deburring external chamfer tool is suitable for all kinds of chuck electric drills, with or without threads can be polished. Suitable for hand drills, cordless drills. 5FINE CRAFTSMANSHIP: Metal deburring external chamfer tool with fine workmanship, CNC fine machining, improved rust resistance and service life, stable performance.