General Tools S605 Five-Piece Jeweler's Screwdriver Set This jewelers screwdriver set is ideal for repairing jewelry, cameras, watches and eyeglasses as well as assembling subminiature parts This set includes four flat blades measuring 0.100, 0.070, 0.055 and 0.040 in. across, as well as one #0 crosspoint bit Black oxide blades ensure a precise fit and are better for delicate work; knurled handles provide a better grip of the screwdriver A swivel head allows more torque to be applied to each blade while using the jewelers screwdriver; The screwdriver set includes an injection-molded plastic stand The nickel-plated screwdriver body provides added protection from corrosion and wear