Catamount pneumatic piercing tools from HammerHead Trenchless Equipment are available in 4- and 5.125-inch sizes. They are ideal for any underground installation that requires minimal disruption to landscapes, buildings or traffic flow. Engineered without mechanical springs, contractors can save on replacement parts. They are easy to service in the field due to their tailbolt design. 800/331-6653; www.hammerheadmole.com.