Self-centering jet point tip on sizes 1/8 inch and Revolutionary tip design stays sharper longer and drills up to 10x faster than other leading drill bitsThree-flatted shank design provides better chuck grip and reduces slippageBit is constructed of M-1 high speed steel for the best combination of strength, heat resistance and wear resistance3/8 in. reduced shank fits all 3/8 in. drills3/8 in. reduced shank fits all 3/8 in. drills5-1/2 in. overall length4-1/16 in. flute length7/16 in. size drill bit