Socket inner diameter: 1/2 inch
Socket outer diameter: 13/16 inches
Features: – Made from strong chrome vanadium steel, extremely durable – Fits most ring or double eye scissor jacks on the market – Easy to use with the following tools: 1) 1/2 inch driver/impact drill/ratchet or standard drive slot; 2) 13/16″ lug wrench/tire iron or socket, or easily add a half inch adapter to any drill; 3) If you don’t have a 1/2″ hex wrench or impact wrench, you can Easily insert a standard drill bit into the 1/2-inch adapter and use any cordless or corded drill with this tool and those difficult scissor jacks