Long service life: Made from aluminum alloy, this multiangle ruler is wearresistant and suited for woodworking environments. It features a semicircular arc for enhanced functionality and easy transportability across different settings. 3D adjustable measuring helper: A multidimensional 3D fitted design enables precise cutting tasks. Ideal for mortise and tenon projects that require exact measurements and flexible angles for consistent results. Easy application: Range from 0 to 180 degrees with a doublepoint mechanism. Onehanded operation reduces calibration time and provides quick locking for efficient use. Intelligent design rule: Enables simultaneous marking on straight and curved paths. Nonslip features improve control, and hollow holes support varied applications. Use scenarios: Mortise and tenon joinery: Set the angle and mark accurate lines for joints, then cut with confidence. Cabinetry and trim work: Mark straight and curved profiles with consistent angles for clean, professional results. Custom hardware layouts: Mark hole patterns and cutouts along straight or curved paths with reliable repeatability.