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, precision grinding technology, good wear resistance and durability. Mainly used for boring and milling, processing iron, steel, plastic, wood, copper, aluminum and other metal materials._x005f_x000D_ _x005f_x000D_ Features:_x005f_x000D_ 1. Forged with high quality 9341 steel, the head is quenched and heat treated, it is high hardness and good wear resistance._x005f_x000D_ 2. The cutter head adopts scientific design, precision grinding technology, good wear resistance and durability._x005f_x000D_ 3. Large vortex design, enlarge chip removal slot, smooth and flat, high temperature resistance, non-stick knife._x005f_x000D_ 4. 1/2 round shank design, mainly used for boring and milling, processing iron, steel, plastic, wood, copper, aluminum and other metal materials._x005f_x000D_ 5. 100% brand new and high quality._x005f_x000D_ _x005f_x000D_ Specification:_x005f_x000D_ Item Name: 1/2 shank steel milling drill bit_x005f_x000D_ Material: high speed steel_x005f_x000D_ Outer blade apex angle: 130_x005f_x000D_ Blade diameter: 20.5mm / 0.81in, 21.0mm / 0.83in, 22.5 / 0.89in (optional)_x005f_x000D_ _x005f_x000D_ Package list:_x005f_x000D_ 1 * Drill Bit_x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note:_x005f_x000D_ Please note that the new type and old type of this product will be sent _x005f_x000D_ randomly, and make sure you will not mind before ordering.