The Echo 91159L Carburetor Adjustment Tool for Walbro Long D Style helps adjust carburetor settings on compatible small-engine equipment. Its long D-style tip fits the corresponding adjustment screw, allowing controlled changes to the carburetor's fuel and air settings as specified by the equipment manufacturer. Proper adjustment supports appropriate engine operation and response. Usi... https://www.wholetoolbox.com/echo-91159l-carburetor-adjustment-tool-for-walbro-long-d-style/91159L.html