




EXJIOTA Automatic Slack Adjuster Tools are a two-piece 5/16" ratcheting slack-wrench set designed to speed up air-brake adjustments and diagnostics on semi trucks, tractor-trailers, and heavy-duty rigs.
This compact two-piece set includes a 5/16" double-square ratcheting slack adjuster wrench and a fork-end release tool engineered for the repetitive demands of fleet maintenance and roadside repairs. Built from carbon steel with rubberized handles, the tools are sized and shaped to work in tight suspension pockets, letting technicians access adjusters without constantly repositioning the tool. The ratcheting head reduces overall time spent adjusting while the fork release gives a positive engagement to depress the slack adjuster button safely.
The ratcheting mechanism lets you change direction without removing the wrench from the adjuster, saving back-and-forth time and reducing fumbling in confined spaces. It keeps the wrench engaged on the square drive while you fine-tune tension, which reduces hand strain during repeated cycles.
The fork-end tool is shaped to positively engage the tensioner button and release it without slipping, unlike a generic pocket screwdriver that can fall out or round the button. Its geometry provides a reliable leverage point so you can hold the adjuster in the released position while making adjustments.
Yes — both pieces are forged from sturdy carbon steel to withstand repeated use and the torque demands of brake adjustments. The handles are covered with a high-quality rubber coating to improve comfort and reduce slippage, extending usability during long maintenance shifts.
The slim, purpose-built shapes let technicians work in narrow clearance areas common on trailers and tractor suspensions. The ratchet reduces the need to reposition the tool, while the fork release securely engages the adjuster without extensive hand movement — both important when space and time are limited.
Who this is for: This two-piece EXJIOTA slack adjuster toolset is aimed at heavy-truck technicians, fleet maintenance teams, owner-operators, and roadside service providers who need rugged, quick-to-use tools for routine air-brake adjustment and troubleshooting. Whether you service long-haul rigs or handle in-yard brake checks, the compact ratcheting wrench and fork release tool deliver a focused solution to help make brake system adjustments faster and more reliable.
Q: What size slack adjuster fit does this set fit?
A: The ratcheting wrench is a 5/16" double-square head designed for common slack adjuster fittings used on many heavy-duty trucks.
Q: Are these tools durable for fleet use?
A: Yes — both tools are made of carbon steel with rubberized handles for long-lasting durability and improved grip during repeated use.
Free shipping across Canada on every order, with no minimum. Orders are processed within 1 business day and standard delivery across Canada usually takes 2 to 5 business days after processing, with tracking by email. See the shipping policy.
Free 30-day returns. You have 30 days from delivery to start a return. Return shipping is free: email us your order number and we send a prepaid label. See the return & refund policy.
Not sure it fits? Email northtrailauto@gmail.com with your year, make, model and engine and we reply within 1 business day.






