Hand operated. Two Valve, cylindrical hydraulic pump assembly, with pressure relief valve.

The GB456A is a hydraulic hand riveter designed specifically for the most efficient installation of all 1/8", 5/32", 3/16" and 1/4" diameter Cherrymax® and High Clinch® rivets. It weighs 20 .5 oz. (.58kg) and is 6-1/4" high x 6" long x 1 3/4" wide without a pulling head. The GB456A has a .5/8” (15.88mm) max. stroke and a minimum rated pull load of 3,500 lbs. (15.6 kN)