Components: 3/8" Diameter spring-loaded Plunger, 1" Diameter x 1-1/2" Length Steel Barrel (weldable), threaded lock nut, sturdy black plastic handle (round) Functionality: Designed for locating, fastening, and quick change operations. Retracts and engages the plunger for various operations. Construction: Consists of a barrel and a plunger assembly, plunger assembly screws into the housing, housing designed for welding into place for added strength. Operation: Pulling on the handle retracts the plunger fully into the pin housing, releasing the handle allows the plunger to extend Materials and Finish: Steel/Plastic Pull Force: Approximately 5 to 15 lbs Applications: Heavy-duty spring action pins used for height and length adjustments. Commonly used in racking systems, fitness equipment, rehabilitation equipment, and various other applications.