HSS high speed steel forging Material: Use high quality HSS high speed steel, after strict heat treatment, the quenching hardness is stable, the rigidity is good, the wear resistance is strong, and the demolition resistance is strong. long duration. Exquisite craftsmanship Using fully automatic sharpening process to ensure it is fully formed and has stable dimensions. High precision and stable performance. The surface finish is good, beautiful and practical. Cutting Part The hardness of heat treatment reaches 63-66HRC, the teeth strength is high, the cut is clean, and the treatment efficiency is high. Exquisite craftsmanship, fine workmanship, easy to operate Use HSS high speed steel forging, anti-rust and wear-resistant laser scale, high hardness and not easy to break These center drill bits are used for metal processing and can provide starter holes for larger drills. They can also be used to form conical notches at the end of the part to install the center of the lathe. These center drills are made of high speed steel with high hardness and good wear resistance. There are 5 center drills in the kit, which can be used to drill holes of different sizes. 5 Piece Double Head Center Drill Bit (1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm) These center drill bits are widely used in lathes to easily cut and remove the chips smoothly. Positioning and positioning exercises are traditionally used to form a tapered hole in the center of a lathe to provide a starting point for standard twist drills and are intended to prevent the bit from rotating. Used to produce parts that need to be processed between centers or center supports in parts. Caution When using these drill bits, the temperature of materials (eg, low carbon metal, low carbon steel, aluminum, acrylic plastic, wood, etc.) will be very high. Please add water or coolant to prevent the temperature from rising. Do not smoke when using the product.