Tru-Cut PM62513 5/8 by 13 SDSMax Bit Single Head Design for Faster Drilling is made with the highest quality American chrome-molybdenum-nickel steel available. The TriCarb grade tip guarantees longer life with faster penetration due to increased chiseling action. The ThunderTwist flute design, combined with the copper brazing alloy, creates the most reliable drill bit on the market.