Feature:1. Made from chrome molybdenum for increased durability, blackened phosphate coating for corrosion conservation.2. Designed for the safe removal of bolts that have rounded off, rusted or painted over.3. Suitable for hand and power tools.4. Can be used with 3/8\" breaker bar/ratchet and also has flats so that they can be used with spanners or wrenches.5. Complete with an useful carrying case for quick and easy storage.Specification:The 13pcs nut bolt extractor socket set has 13 different tools 1/4"-11/16" and 8mm-19mm, used to remove rusted bolts.Features:Made from chrome molybdenum for increased durability, blackened phosphate coating for corrosion conservation.Designed for the safe removal of bolts that have rounded off, rusted or painted over.Suitable for hand and power tools.Can be used with 3/8" breaker bar/ratchet and also has flats so that they can be used with spanners or wrenches.Complete with an useful carrying case for quick and easy storage.Specifications:Material: SteelPackage Weight: 800g / 28.22ouncesPackage Size: 170 * 100 * 45mm / 6.69 * 3.94* 1.77inPacking List:1 * 13mm1 * 9/16"-14mm1 * 5/8"-16mm 1 * 17mm1 * 11/16"1 * 3/4"-19mm 1 * 1/4"1 * 5/16"-8mm1 * 3/8"1 * 10mm1 * 7/16"-11mm1 * 12mm1 * 1/2"1 * Carrying BoxPackage List:1 * 13mm1 * 9/16"-14mm1 * 5/8"-16mm 1 * 17mm1 * 11/16"1 * 3/4"-19mm 1 * 1/4"1 * 5/16"-8mm1 * 3/8"1 * 10mm1 * 7/16"-11mm1 * 12mm1 * 1/2"1 * Carrying Box