The Proto Premium Combination Square features a hard-chrome-plated, durably etched blade that resists rust and is built to last. Precision-machined working surfaces deliver improved accuracy, while the easy-to-read vial and built-in scriber make layout and surface marking fast and convenient.
The high-visibility yellow die-cast handle with brass hardware provides a secure, durable grip for demanding jobsite conditions. Ideal for carpenters, machinists, and tradespeople who need reliable 45° and 90° measurements in both inch and metric scales.