OTC 5052 S-Cam Brake Slack Adjuster Tool OTC S-Cam Brake Slack Adjuster Tool Enables you to quickly check the brake adjustment on class 7 or 8 trucks and trailers equipped with S-cam brakes Features a sturdy four-position handle to provide the leverage you need at the proper angle Works on manual or automatic slack adjusters Crafted from high-grade materials to ensure quality performance over the lifetime of the tool