5Pack Inside Corner Bracket Gusset 77x77x40mm 4080 for 4040 Series Aluminum Extrusion Profile Black

Description： Made of aluminum die casting alloy with a sandblasting surface this aluminum corner bracket is of good rust resistance high hardness and long service life. Used for the L or cross right-angle connection of two aluminum profiles or lock connection of heavy frames. Insert the two ends of the L-shaped angle bracket into the groove of the profile and tighten the fixing screws to fix the two profiles. Suitable for 4040 series aluminum profiles with slot 8mmmm. Widely used for building industrial aluminum frame structures 3D printers CNC routers CNC laser cutters robotics projects woodworking machinery fish tank etc.