Mechanical Puller Forcing Screw

A cylindrical, threaded item which may be headed or headless. All or part of the unthreaded portio (s) must be of a single diameter equal to or smaller than the major diameter of the threaded portion(s) . Headless items must have an external or internal wrenching feature or have a provision to facilitate turning. The item must be designed to exert pressure by screwing motion when used with a mechanical puller.