Quality Material: This precision screwdriver set is made of tool steel, rugged and durable Package Contenct: 5 pieces micro precision screwdrivers, different types of screwdrivers are enough for your daily repair work Size: Watchmakers screwdrivers have 5 different sizes, 0.8mm, 1mm, 1.2mm, 1.4mm and 1.6 mm, different sizes correspond to different colors, easy to distinguish Function: Precision screwdriver is used for watch repair, watch battery replacement, and disassembly watch bracelet screw chain Application: Suitable for watch repair, eyewear repair, jewelry work and electronics repair, Weight: 0.1102090847738 pounds, Manufacturer: N&N