Multicolor Repair Watches Tools Clocks Watches Screwdriver Set Small Screwdriver 9 in 1 Set Function:Rotating base, transparent dust cover, cartridges storeroom.Each segment can be replaced. A word Screwdriver Diameter: 0.8/1.0/1.2/1.4/1.8/2.o (mm). With this item your life will be more convinient, it is very helpful for your dailylife. Item Type:Repair Tools & Kits Material:alloy steel