14 piece Bolt and Nut Remover Set (SAE/Metric)：3/4" ( 19 mm ), 11/16" , 17mm, 5/8" ( 16 mm ), 9/16" ( 14mm ), 13mm, 1/2", 12mm, 7/16" ( 11mm ), 10mm, 3/8", 5/16" ( 8mm), 1/4" and hex adapter 1/4'' to 3/8'' 12 pcs Screw Extractor and Drill Bit Set including 6 pcs Cr-Mo Spiral Screw Extractor kit (#1, #2, #3, #4, #5, #6) and 6 pcs HSS Left Hand Drill Bit Set (3/32", 1/8", 5/32", 1/4", 9/32", 3/8") Screw Extractor Set: made of high quality 35# Cr-Mo and HSS steel, heat treatment, high strength, impact-resistant, durable, easily remove rusted, damaged or broken screws, bolts and studs and all types of fasteners Impact Bolt & Nut Remover Set: Reverse spiral groove design, easy to strip, rust or damage bolts, nuts and screws. Comes with a 3/8-inch square driver and hex adapter that is compatible with average to heavy-duty power tools, hand tools or air tools Easy to Pick and Carry: The 4-in-1 screw and nut extractor set comes with a sturdy storage case for easy storage. You can take it to any corner of the world, which is a great convenience for you. It is an ideal tool set for DIY enthusiasts and professionals

The comprehensive set includes a versatile range of bolt and nut removers in both SAE/metric sizes along with a convenient hex adapter.  It also features a complete screw extractor kit comprising spiral extractors (#1-#6) and HSS left-hand drill bits.  Both sets are crafted from durable materials for efficient removal of rusted or damaged fasteners.  The impact bolt & nut remover set's reverse spiral groove design makes it easy to tackle stripped or damaged bolts, nuts, and screws using standard power tools.