Ferree's makes four swivel top screwdrivers; three small sizes and one large. All of them are sturdily built. Blade lengths and tips vary and blades are replaceable. Tip widths range from .062" (1.6mm) to .125" (3.2mm). Each blade has only one tip. The swivel tops are hex shaped so they won't roll on the bench. F72 Screwdriver with 6" (152mm) blade, .125" (3.2mm) tip,1/2"dia. handle, a versatile swivel top screwdriver. Also Available in the following styles F66 Screwdriver with 1-1/2"long blade .062" tip F66A Blade, 1-1/2" (38.1mm) long with .062" (1.6mm) tip SS632 Replacement blade set screw AW116 Small Allen wrench to fit blade set screw F67 Screwdriver with 3"long blade .085" tip F67A Blade, 3" (76mm) long with .085" (2.16mm) tip F68 Screwdriver with 6"long blade .125" tip F68A Blade, 6" (152mm) long with .125" (3.2mm) tip F60 Swivel Top Screwdriver