Model Compatibility: Fits 028, 038, MS380, and MS 380 chainsaw models as a direct replacement chain adjuster tensioner screw kit. Quantity Included: Contains 2 pieces per kit to replace both chain adjuster tensioner screws required for the specified chainsaw models. Function Purpose: Restores chain tension adjustment functionality when installed in place of worn or missing tensioner screws. Part Type: Replacement spare tool part designed specifically for the chain adjuster mechanism on compatible chainsaws. Installation Use: Intended for use as a functional substitute for the chain adjuster tensioner screws on the listed models., Manufacturer: acTtvtEYM