The speed helix design penetrates 3X faster than standard bits</br>Triple tempe black oxide coated bits last 50% longer than regular highspeed steel and offer uced friction between bit and workpiece</br>135?? split point starts on contact with no walking or skating and no center punch is required</br>The benefits include easier drilling?? uced heat?? extended drill bit life and extended cordless battery life</br></br>Product Description</br></br>BOSCH 1/8 In. x 12 In. Ext</br><br/>http://www.amazon.com/gp/product/B001AHSVGM