Professional tool for commercial or occasional use -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 and screws from 3mm - 26mm -Metric measurements but also suitable for imperial sizes as well -Suitable for removing studs, bolts, screws -Supplied in a blow molded case for easy storage and transportation SET INCLUDES THE FOLLOWING - NUMBER 1 - for stud sizes - 4mm - NUMBER 2 - for stud sizes - 4.5mm - NUMBER 3 - for stud sizes - 6.4mm - NUMBER 4 - for stud sizes - 7.6mm - NUMBER 5 - for stud sizes - 11mm - NUMBER 6 - for stud sizes - 15mm - NUMBER 7 - for stud sizes - 19mm - NUMBER 8 - for stud sizes - 24mm