Aluminum Alloy Anti Slip Laser Calibration Ruler Student Cutting Protection Drawing Tool School Office Supplies Straight Scale

18.5mm bezel, Protect your hands from cuts clear scale, easy to identify Anti-skid pad + stainless steel strip. Smooth use and not easy to deform The laser laser scale is clear and accurate, and does not fade 3.9mm thick body with T-shaped structure, durable and not easy to deform. The thickness of ordinary steel ruler is about 1mm.syi