Feature 1M4 Threaded Hole Linear Pattern: This right angled triangle reinforcement base has an M4 threaded hole linear pattern with a hole spacing of 8mm on 3 sides, which is convenient for connection. 2Application: This reinforcement base can be used for 90 degree joints between grid orifice plates, beams and brackets, etc. 3Supporting Function: This triangular reinforced base is suitable for connecting and supporting robot accessories. 4Aluminum Material: Adopts high quality aluminum triangular reinforced base , which is prevent rust and firm, and has a longer service life. 5Important Fasteners: These right angle brackets are important fasteners that connect 2 wooden furniture parts together. Item Type: TriangleSupportBracketsMaterial: AluminumSurface Treatment: Anodic OxidationSupport Size: Length Approx. 43mm / 1.70in, Width Approx. 43mm / 1.70in, Thickness Approx. 7mm / 0.28inThreaded Hole Model: M4 Package List 2 x Triangle Reinforced SupportNotePlease match the appropriate size before use