Feature:1. Multi Purpose: Drill bit is suitable for iron aluminum copper, stainless steel, high speed steel, manganese steel, all kinds of quenched steel.2. Fast Drilling: 19.5mm drill bit adopts spiral chip removal design, smoother chip removal, smoother and incisive slot, fast cutting, high drilling efficiency.3. High Accuracy: Black twisting drill adopts 118° incisive angle design, fast and accurate drilling, saving time and effort, and improving work efficiency.4. Excellent Material: Small shank drill bits are made of high quality high speed steel, with high hardness, stable performance, sharpness and durability.5. Practical Durable: Straight shank twisting drill has a finely ground and incisive edge to meet different cutting precisions. It is very sturdy and practical.Specification:Item Type: Drill BitProduct Material: High Speed SteelBlade Diameter:Approx. 19.5mm / 0.8inShank Diameter: 1/2 Inch (12.7mm)Drill Bit Length:Approx. 150mm / 5.9inUses: Suitable for Iron, Aluminum, Copper, Stainless Steel, High-speed Steel, Manganese Steel, Various Quenched Steel Parts Package List:1 x Drill Bit