Drop-forged steel universal joint. Suitable for use on all types of air impact tool. Chrome Vanadium steel with phosphate finish for added corrosion resistance. Spring-ball socket retainer and drilled head to accept retaining pin. Features & Benefits:Drop-forged steel universal joint.Suitable for use on all types of air impact tool.Chrome Vanadium steel with phosphate finish for added corrosion resistance.Spring-ball socket retainer and drilled head to accept retaining pin.Lifetime guarantee*.Model No. AK5497 Specifications: Model No AK5497 Brand: Premier Drive: 3/8"Sq(F) x 3/8"Sq(M) Length: 50mm Nett Weight: 0.08kg