CENTER ROCK'S ALL*PRO LINE UP Center Rock Inc. designs, manufactures, and distributes a complete line of pneumatic rock drilling tools and products used by contractors across the globe. Our products include a full line of pneumatic rock drilling tools and accessories including DTH hammers & bits from 3.5 " to 48 " diameter, overburden drilling systems, and LP Canister Drills from 18 " to 144 " (Standard, Reverse Circulation, HDD, Mining & Utility). We also offer mobile workshops and custom manufactured drill strings, all supported by factory service technicians and application specialists. For more information, please visit CenterRock.com.http://www.centerrock.com/