SIZE: 1/4MM, 8MM,3/8MM, 10MM, 11MM, 12MM, 1/2MM, 13MM, 14MM, 16MM, 17MM, 11/ 16MM, 19MM; DRILL: 2.4, 3.2, 4.0, 6.4, 7.2, 9.5; SCREW EXTRACTORS: 1#, 2#, 3#, 4#, 5#, 6#; EXTENSION BAR: 3/8" MATERIALS: 3/8" NUT BOLT EXTRACTOR: 42 CR-MO, HRC: 47-50, DRILLS: 4341, SCREW EXTRACTOR: 35 CR-MO