【BRAKE ADJUSTMENT TOOL】Automatic slack adjuster release tool set includes 5/16″ ratchet double square offset reversible wrench and automatic release tool.【DURABLE AND STURDY】Air brake slack adjusters feature tool-grade steel and an offset, reversible ratchet design and Ergonomic slip resistant molded (TPR) handles, improved comfort and stability during brake adjustment.【SEMI TRUCK TOOLS】The slack adjuster wrench tool allows more power with less fatigue. Provide enough space for hands and knuckles to adjust the automatic slack adjuster, Improve efficiency and help finish your job. Good assistant for semi truck drivers.【AIR BRAKE SYSTEM ADJUSTMENTS】This slack adjuster features a side-mounted forward and reverse lever, allowing for quick direction changes without removing the brake adjuster tool from the slack adjuster,used to adjust the brake-to-drum clearance.【BRAKE SPRING TOOL】The tools are made to fit semi truck, heavy duty truck,trailers,class 8 vehicles,durable and sturdy. Makes your job easier. Product Description Slack Adjuster Tools Set 5/16″ ratchet size with double square offset reversible wrench & Automatic release tool Release tool slides under the button of the pull-pawl on the automatic slack adjuster until fully seated while the wrench is used to adjust the brake-to-drum clearance Slack adjusting tools are made to fit semi truck, heavy duty truck,trailers,class 8 vehicles,durable and sturdy