- Durable construction: built from high-quality zinc alloy stainless steel, this protractor combination is rust-proof, robust, durable, and resistant to deformation. - High accuracy: laser-engraved double-sided scales provide metric and inch markings for precise, easy-to-read angle measurements and bevels. - Multifunctional design: adjustable angle with a universal angle feature makes it a versatile tool for woodworking; it supports measurements of lengths, widths, 90-degree angles, 45-degree mitre angles, depths, heights, and scribing. - Removable design: secured or released with a brass screw, allowing the sliding steel ruler and the spirit level to be used independently as needed. - Practical applications: - Woodworking and carpentry: set and transfer 90-degree and 45-degree bevels for joints, mitre cuts, and layout lines. - Cabinet making and metalwork: measure and mark precise lengths, widths, depths, and heights to ensure accurate fabrication. - Layout and scribing: use as a versatile reference tool for marking straight, accurate lines on workpieces.