The Lock Technology 10-pc Shockit Crows Foot Sets, Nos. LT1900 and LT1910, are designed to loosen hydraulic fittings on tractors, forklifts, and heavy equipment. The sets use the force and vibration of an air hammer and allows safe and precise hammering with non-turning punch. With a compact design, they fit into small spaces between hydraulic lines and reach difficult line nuts with offset punch. The patented interlocking design also keeps punch from slipping off socket. The sets are available in SAE and metric sizes.