Straight Ruler, Square, Gauge manufacturer / supplier in China, offering Aerospace Aluminum PRO Kit - 300mm Laser-Engraved Ruler W/ Anti-Static Accessories, Industrial Laser Multitool Set - 12” /300mm Anodized Ruler & Calibrated Workshop Tools, Calibrated Workshop System - Nist-Traceable 12” Laser Ruler & Multi-Angle Guides and so on.