Straight Ruler, Square, Gauge manufacturer / supplier in China, offering 150mm Laser-Calibrated T-Square - Anodized Aluminum for ± 0.05mm Workshop Accuracy, Compact Home Workshop T-Square - Lightweight Aluminum for Shelving & Small Crafts, Beginner-Friendly Woodworking T-Square - Non-Slip Base for Hobbyists & DIY Projects and so on.