The product is 1x16x21 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>1"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 1x16x21 SDS Max Bit. Easy to use. The product is manufactured in China.</br></br>Amazon.com</br></br>This Bosch 1-inch by 16-inch flute by 21-inch SDS-Max rotary hammer drill bit offers improved performance with its carbide-tipped head with 4 cutting edges. The bit is designed to help reduce vibration when drilling. The bit shaft wears at a slower rate and better withstands repeated use.</br><br/>http://www.amazon.com/gp/product/B0000TZY0Wrr s