Precisions measuring aluminum alloy triangle ruler features 0 point positioning rods and double sided scale, eliminating measurement drift for accurate result in high accuracy tasks Essential for engineers, carpentry, and technicians requiring accurate measurement tools in woodworking shops, construction site, and precisions manufacturing environments Lightweight yet wear resistant construction combines quick releases rods, double scale cm / inch markings, and rotating alignment fences for versatile angles positioning and multi tool functionality Innovative double positioning rods enable bidirectional alignment, while knurled locking nut secure 15° / 30° / 45° preset angles for rapid repeat measurements Optimizes workflow in cabinetry installations, structural framing layouts, and mechanical drafting projects through instantly calibration and double directional reference edges, Manufacturer: ERRORY