High Quality: Wheel nut extractor set with high force and impact resistance. Bolt nut puller made of high hardness chrome molybdenum steel. The reverse spiral splines are designed to bite and provide maximum gripping power. 3/8'' Square Drive: Puller sets have hex flats for use with open end wrenches, pliers, adjustable wrench, sockets or vise grip locking pliers, 3/8'' square drive for use with hand ratchets, impact wrenches and pneumatic ratchets. Design: The spiral socket design allows for a secure fastening connection on the round fastener to be severed. These nut extension sets feature a black oxide finish that provides greater strength and durability and prevents corrosion. Multifunctional: The rotary socket wrench set is suitable for removing rust and wear and tear as well as covering the paint layer on nuts, bolts. The bolt remover provides maximum gripping power for easy removal of broken, damaged or rusted nuts, bolts and screws. 17*9.5*4cm