Just lift the handle of these push button ratchet levers to disengage gear teeth and rotate freely for quick adjustment. Release the handle to reengage and tighten. These handles are perfect to be used in application requiring frequent and quick adjustments and when working in confined areas. Handles are made from nylon with a a temperature range of -40° to +200° F. Handles have 5/16 18 threaded stud that is 1" long.