Features and Benefits: For grip wrenches using single-lead thread adjusting screw; Adapter threads onto a slide hammer with a 5/8"-18 thread; Grip wrench threads onto 7/16"-l4 end of adapter for pulling use; This is usually included in most of the OTC puller kits. ; This tool has the ability to add more force when pulling. It threads onto slide hammer with 5/8"-l8 thread. It's very simple to use.; Features: For grip wrenches using single lead thread adjusting screw. Adapter threads onto slide hammer with 5/8 in.; in.;-18 thread. Grip wrench threads onto 7/16 in.; in.;-14 end of adapter for pulling use.