Wide measurement range: Measures from 6.5 to 14.25 inches (160 to 360 mm), accommodating a broad range of brake sizes. The scales are easy to read in both metric and imperial units, making it suitable for standard and brake systems and ideal for a wide range of automotive applications. Double scale combination: Features dual metric and imperial scales for precise brake line setup before drum installation. Clear markings enable accurate measurements and adjustments, reducing time and effort while ensuring brake performance for professional mechanics and enthusiasts. Easy to use locking knob: A userfriendly locking knob enables hassle measurements. Simply measure the brake drum, align it with the brake shoe, and lock for accurate positioning. This feature streamlines adjustments and saves time during brake servicing. Versatile brake measurement tool: Engineered to measure drum brake shoe adjustments, compatible with vintage drumstyle rear brakes, parking brake shoes, handbrakes, and disc brake rotors. Its universal design helps mechanics handle diverse brake systems with improved productivity and accuracy. Practical use scenarios: Restoring a classic car with drum rear brakes; use to set proper shoe alignment before final assembly to ensure consistent braking performance. Performing preinstallation checks on vehicles with druminhate or parking brake systems; verify correct shoe position before completing installation. environments with mixed brake work (drum and disc); quickly align and verify tolerances during routine brake service and maintenance.