Set contains every socket in our 1/4″ Surface Drive line; plus 3 extensions; universal joint; 1/4″ F x 3/8″ M adapter and 1/4″ Hex x 1/4 M adapter. Fractional sizes 3/16″ to 9/16″ and Metric sizes 4mm to 15mm. Universal sizes 1/4″ to 9/16″ and 5mm to 15mm. Set Contains: 72 Pieces 1/4″ Surface Drive 72 Piece Complete Set Molded Storage Case Weight: 7.77 lbs. Lifetime Warranty (Individual Parts Only) 10 Pieces Fractional Standard Length Sizes: 3/16″, 7/32″, 1/4″, 9/32″, 5/16″, 11/32″, 3/8″, 7/16″, 1/2″, 9/16″ 10 Pieces Fractional Deep Length Sizes: 3/16″, 7/32″, 1/4″, 9/32″, 5/16″, 11/32″, 3/8″, 7/16″, 1/2″, 9/16″ 14 Pieces Metric Standard Length Sizes: 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 4.5mm, 5.