Features: Using high quality high speed steel, through special treatment, processed iron, steel, plastic, wood, copper, stainless steel, aluminum and other metal materials. Durable, mainly used for drilling. Specifications:

Material: HSS M2 Size: 13mm-35mm Shank Diameter: 1/2 inch =12.7mm Length: about 150mm Package Included:1x HSS Twist Drill Bit