Easy to Carry and Storage: Heavy duty blow molded case lets all the bolt remover stay organized. You can take it to anywhere you are want Metric SAE Sizes: Nut Remover are precision engineered to easily extract damaged bolts, nuts and screws even if they are stripped or frozen. You can depend on it quality to make every job safer and a lot less frustrating Wide Application: 10 Pieces bolt extractor tool set used on broken removing damaged,dead,rusted,rounded-off exhaust manifolds,oil filler plugs,rounded starter bolts,etc Hight Quality Material: Made of hard chrome vanadium alloy steel material that helps ensuring maximum durability with impact drivers,Black oxide finish that they are of strong strength and increases the life of the bolt remover High Power Impact: Reverse spiral flutes are designed to bite down to provide Maximum gripping power, Fits heads size 9mm 10mm 11mm 12mm 13mm 14mm 15mm 16mm 17mm 19mm to remove damaged