7pc Micro Precision Screwdriver Set 0.9 - 2.0mm with Replacement Tips - Jewelry, Watch Repair, Electronics Precision screwdriver set in ultra-fine sizes for watchmaking, jewelry repair, electronics Solid brass shaft, hardened & tempered high-carbon steel tips, aluminum spinner cap Flat/slotted head sizes 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.4mm plus replacement tip for each size Ridged shafts for non-slip hold, spinner caps let you apply force with palm while turning Color-coded caps for quick size identification, brass set screws; 3" length with 1" tip