Sunex International 3305 5 Pc. 3/8" & 1/2" Dr. Adapter and Universal Joint Impact Set CR-MO alloy steel for long life Lifetime warranty, except adapters Heavy duty blow molded storage case Includes most common sizes used for automotive repairs Included in SAE - inches: 3/8 Drive Universal Joint, 3/8F x 1/2M adapter, 1/2 Universal Joint, 1/2F x 3/8M Adapter, 1/2F x 3/4M Adapter