Professional extractor set for commercial or occasional use Complete set of extractors for all needs and requirements Set includes stud extractors / screw extractors and nut extractors STUD EXTRACTORS DESCTRIPTION Professional stud extractors for commercial or occasional use Manufactured from chrome vanadium steel for strength and durability Socket type design to remove threaded studs from engine blocks, without damaging the threads Also removes the studs that have had the thread damaged Will remove and install studs The rollers are the concentric roller bearing type grip 1/2" drive so will fit any 1/2" drive ratchet / bar etc... Includes stud extractors for threads with the following diameters 6mm (1/4"), 8mm (5/16"), 10mm (3/8") and 12mm (1/2") TWIST NUT EXTRACTOR DESCRIPTION Twist extractors to remove broken studs, pipes, set screws, grease fittings etc... Manufactured from chrome molybdenum for strength and durability Will easily bite into and grip the softer bolts Metric size bolt extractors Can also be used on screw heads and studs Can be turned with a ratchet or metric spanner 3/8" drive so will fit any 3/8" drive ratchets, extensions etc... Set includes the following sizes - 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 16mm and 19mm SCREW TAPERED DESCRIPTION These stud, screw extractors will remove any stud / screw pipes and bolts Manufactured from hardened and heat treated steel for strength and durability Will easily bite into standard bolts and screws Simply drill a pilot hole in the broken fixing and screw in the left handed threaded extractor for easy removal of broken screws and bolts Can be used with a spanner / socket or even tap holder on the end of each spiral extractor For removing studs, bolts and screws Set includes the following sizes • 1 ranging from M3 - M6 • 1 ranging from M6 - M8 • 1 ranging from M8 - M11 • 1 ranging from M11 - M14 • 1 ranging from M14 - M18 Set comes complete in a blow molded case for easy storage and transportation