1,[Premium and High quality]Stripped bolt nut remover processed from high hardness chrome-vanadium steel, reverse spiral flutes are designed to bite down to provide maximum gripping power. 2,[Various Sizes in One Set]5 pieces 1 or 2 inch drive bolt and nut remover kit comes with easily readable marks: 17mm, 19mm, 21mm, 22mm, 12mm. 3,[Universal Design]Standard 1 or 2 inch square drive for use with hand ratchets, impact wrenches and air ratchets. 4,[Safe Storage]The entire set is packed in a storage box for easy storage. You can take it to any corner of the world, whether it is in your garage or home. 5,[Wide Application]The special internal thread design are precision engineered to easily extract damaged bolts, lug nuts and screws in home appliance, vehicle repair and industrial instrument, even if they are stripped, rusted or frozen. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.