ITEM NAME:17mm Reduced 1/2 inch Straigth Shank Electric HSS Twist Drill Bit Tool H3C3 17mm Reduced 1/2 inch Straigth Shank Electric HSS Twist Drill Bit Tool H3C3 Package included: 1 x HSS Twist Drill Bit 100% Brand New and High Quality. Using high-quality high-speed steel, through special treatment, processed iron, steel, plastic, wood,copper, aluminum and other metal materials. Durable, mainly used for bore machining Size: 17mm Shank Diameter: 1/2 inch = 12.7mm Length: about 150mm Material: HSS Colour:?Black Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/-1-3cm.