11 Piece Precision Screwdriver Repair Set for Jewelers, Watchmakers- Hand Tools This is a new set of 5 reversible slotted screwdrivers Perfect for screws used in miniature models, eyeglass frames and electronic products These have hexagonal heads to prevent them from rolling The lightweight handle is knurled, polished aluminum with a swivel palm top Tip sizes measure approximately: 0.86, 0.90, 1.02, 1.18 and 1.45 mm