. trustworthy lineament - from carbon steel and are tempered twice for unscheduled hardness and durability. on wood and machine screws, as well as two-dimensional, hex, or multicolor finished screws. . 8-piece weighty duty steel, divers sizes of screw setup to meet divers needs. . setup size includes # 1 for 1/8 '' -5 / 32 '', # 2 for 5/32 '' -3 / 16 '', # 3 for 3/16 '' -1 / 4 '', # 4 for 1/4 '' -5 / 16 '', # 5 for 5/16 '' -7 / 16 '', # 6 for 7/16 '' -9 / 16 '', 7 # for9/16 '' -3 / 4 '', 8 # for 3/4 '' -1 ''. . spotted Screws Bolts And Water Pipes - These extractors will remove most kinds of spotted, stripped, rusted, impoverished, or cragfast screws from any wood or alloy surface with congenator ease. The Modern two water pipe, designed for the impoverished water pipes. . It can some of the tract screwdriver can not be disassembled spotted bolts, screws, bolts and pipes.Reverse thread bits easily remove screws, bolts, studs, and rib pipe fittings.