Set contains Fractional sizes 5/16" to 3/4" and Metric sizes 8mm to 19mm in both standard and deep lengths plus a 3" extension/ 3/8" x 3/8" universal joint and 1/4" hex x 3/8" square adapter.; Set Contains 43 Pieces ; 3/8" Drive 43 Piece Standard/Deep SAE/Metric Set; Molded Storage Case; Weight: 9.64 lbs.