This 1/2 inch shank high speed steel twist drill bit forged with high quality 9341 steel, the head is quenched and heat treated, it is high hardness and good wear resistance. The cutter head adopts scientific design, accuracy grinding technology, good wear resistance and durability. Mainly used for boring and milling, processing iron, steel, plastic, wood, copper, aluminum and other metal materials. Features: 1. Forged with high quality 9341 steel, the head is quenched and heat treated, it is high hardness and good wear resistance. 2. The cutter head adopts scientific design, accuracy grinding technology, good wear resistance and durability. 3. Large twist design, enlarge chip removal slot, glossy and flat, high temperature resistance, non-stick knife. 4. 1/2 round shank design, mainly used for boring and milling, processing iron, steel, plastic, wood, copper, aluminum and other metal materials. 5. 100% brand new and high quality. Specification: Item Name: 1/2 shank steel milling drill bit Material: High speed steel Outer Blade Apex Angle: 130 Blade Diameter: Approx. 25mm / 1in, Approx. 30mm / 1.2in (optional) Package list: 1 x Drill Bit Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering