Crafted with rustproof stainless steel, this thickened ruler maintains structural integrity in humid environment Premium 50cm stainless steel ruler features double scale (cm/inch) engraving for precise measurements, ideal for professional and enthusiasts seek accuracy Ergonomic anti slip grip enable secure handling during extended use and space saving vertical storage when not in use Perfect for architects, artists, students, and craftsmen requiring measurement tool for technical drawing or workshop projects Wide application in classrooms, workshops, or construction sites – double as a straight edges for drafting, woodworking alignment, or home improvement tasks