1. 5/16 inch double square ratchet wrench provides reversible ratchet action, angled head for easier operation 2. Facilitates better installation and repair of air brake systems on heavy trucks, long-haul trucks and trailers, improving braking performance 3. The fork-end designed tool can be safely installed under the pull claw, allowing hands-free operation 4. No prying is required to release the anti-reversal mechanism, apply more steering force and reduce hand fatigue 5. Material: metal + ABS 6. Size: automatic slack adjuster release tool is about 23.3cm, ratchet wrench is about 17cm
