7 Screwdriver Set Jeweler Watch Electronics Parts Tools This is a new set of 7 precision screwdrivers. Great for watch, eyeglass and electrical repair. These screwdrivers are nickel-plated to prevent rust. Has reversible, double-ended blades and threaded ferrules for easy replacement. The tips are flat and measure: 0.58, 0.73, 0.78, 0.88, 0.95, 1.20 and 1.27 mm