3-12/4-12/4-20 mm Step Dril Bit Metal Hole Cutter Core HSS High Speed Steel Titanium Step Drill Bits

★ Name: Steel drill bit★ Scope of application: It is very suitable for cutting various materials, including steel, brass, wood, plastic, etc.★ Specification parameters:1. Material: High -speed Steel2. Color: Gold3. Size: 3-12mm/4-12mm/4-20mm★ Function (Features):1. This is a new high -speed steel -step large -step dental wheel drilling titanium drill head pores.2. Made of high -quality high -speed steel, surface titanium plating to reduce friction and fever.3. It is very suitable for cutting various materials, including steel, brass, wood, plastic, etc.4. High -speed steel, high quality, good durability, suitable for you to use professional drills, for removing burrs, chamfering, elliptical hole expansion suitable for punching★ Notice:1. Due to manual measurement, please allow a difference of 1-5 mm, thank you.2. Due to the differences between different display, the picture may not reflect the actual color of the product.