Product features: non-perforated design, interior with 4 side grooves, can be used without fixed direction Packing method: opp bag Product weight: 100 g Product material: chrome vanadium steel Inner diameter of the slot: 1/2 inch Outer diameter of slot: 13/16 inch Features: - made of sturdy chrome-vanadium steel, very durable - fits most ring or double-hole jacks on the market - easy to use with the following tools: 1) 1/2" drive/impact drill/ratchet or standard drive slot; 2) 13/16" ear wrench/tire iron or socket, or easily add a half inch adapter to no no matter how little; 3) If you don't have a 1/2 inch hex wrench or impact wrench, it's easy to insert a standard bit into the 1/2 inch adapter and use any which cordless or corded drill with this tool and these difficult shearing jack Products include: 1 x 1/2" scissor jack adapter