Straight Ruler, Square, Gauge manufacturer / supplier in China, offering Factory-Outlet 12-Inch Aluminum Rafter Square - Laser-Adjustable Multi-Task Tool Kit, Multi-Angle Aluminum Rafter Square Tool - Laser-Adjustable 12" Ruler for Home Improvement, 12"/300mm Professional Rafter Square with Laser Marking - Ergonomic Aluminum Design for Daily Use and so on.