The product is 3/4x16x21 SDS Max Bit</br>Easy to use</br>The product is manufactured in China</br>Carbide tipped bit head is harder?? tougher?? and more resistant to extreme loads</br>3/4"iameter?? 16"useable length?? 21"overall length</br>Four chiseling faces and cutting edges double the chiseling action for more efficient drilling</br></br>Product Description</br></br>The product is 3/4x16x21 SDS Max Bit. Easy to use. The product is manufactured in China.</br></br>Amazon.com</br></br>The Bosch HC5031 carbide tipped spiral bit with Wild Boar multi-cutter by head has 4 chiseling faces and cutting edges for more efficient drilling. Design offers smoother drilling with less vibration while extending bit life by 50-percent. For use in drills requiring SDS-max shank.</br><br/>http://www.amazon.com/gp/product/B0000TZXZSSpro