Feature: 1. Watch Screw Adjustment Tool: This tool is specially designed with the end to grip and rotate screws precisely, allowing for accurate adjustment of tiny screws on the watch movement's balance wheel. 2. Professional Watch Movement Tool: Compatible with for AP3120/312 movements, this tool is a reliable assistant for watch maintenance, ensuring precise and professional adjustment of your watch movement. 3. High Stability Alloy Material: Made of excellent quality alloy steel, this tool guarantees stability and durability, performing excellently in both home use and professional repairs. 4. Non Slip Handle: The watch setting timing balance screw tool features a metal mesh non slip handle, ensuring longevity and preventing slipping during extended or frequent use for safe. 5. Ergonomic Design: The ergonomic handle design makes use easy and effortless, suitable for both professional technicians and hobbyists to easily adjust timing screws, simplifying watch maintenance. Specification: Item Type: Watch Setting Timing Balance Screw Tool Material: alloy steel for AP3120/312 movement, balance wheel timing screw adjustment. Size: Approx. Length: 88mm / 3.5in Width: 6mm / 0.2in. Package List: 1 x Watch Setting Timing Balance Screw Tool 1 x Storage Tube