Its half circular design combines a scribing rulers with clear measurements and 0-180° adjustable angles, providing stable for error resistant layout tasks across multiple fronts Engineered to outperform traditional protractors with its resistant aluminum alloy construction, this multifunctional tool ensures unseamed conversion between layout, measuring, and angles replication tasks Ideal for professional woodworkers, craft enthusiasts, and international project managers requiring standardized measurements for crosses border construction or home renovations workflows Perfectly suited for framing, cabinetry, and metalworking applications where rapid angles transfers and consistent marking efficiency is critical in workshop or jobsites environment The 3D Adjustable Carpentry Square Protractor features a accuracy engineered 180 degree quick marking guide, crafted from aluminum alloy for long time accuracy in woodworking projects, Manufacturer: Oxxggkao