Features 1、Impact bolts and nuts remover set can extract damaged bolts, nuts and screws easily even if they are stripped or rusted, making your job faster, safer, also coming with heavy duty storage case to keep everything safe and neat. 2、13 piece nut remover tool set using 3/8inch drive and covering most used imperial and metric sizes: 3/4in(19mm), 11/16in , 17mm, 5/8in(16mm), 9/16(14mm), 13mm, 1/2in, 12mm, 7/16(11mm), 10mm, 3/8in, 5/16(8mm), 1/4in. 3、Special internal thread design providing excellent torsion to grasp the bolts nuts and screws tightly and won't let go, the more you turn, the tighter the socket grips, no worry about slipping. 4、The nuts extractor socket sets and drive made of high hardness chrome molybdenum steel, with black oxide surface providing greater strength and durability. 5、Coming with a 3/8 inch square driver/1/4in hex adapter fit with socket wrench or impact wrench, manual ratchet, universal joint, etc. the through hole design can reach the bottom of long fasteners for tight grasp. Specification Item Type: Extraction Socket Set Material: Chrome Vanadium Steel Color: Black Purpose: Nut Extractor Inch Size: 1/4in, 5/16in, 3/8in, 7/16in, 1 /2in, 9/16in, 5/8in, 11/16in Metric Size: 8mm, 10mm, 11mm, 12mm, 13mm, 14mm, 16mm, 17mm, 19mm Quantity: 13 Pcs Package List 13 x Extraction Socket 1 x Blue Storage Case