• 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.