The 3 hole - triangular pivot plate is an external connection method that can be used either with a nub or mounted directly to the T-slot. It is typically used to create a structured angle connection between profiles. This fastening option provides a long-lasting connection and requires no machining services. It can be easily assembled, lending itself to repositioning and reuse. The suggested mounting hardware for the 3 hole - triangular pivot plate can be found on the "Suggested Hardware" tab. Helpful Hint: Use double slide-in economy T-nut bolt assemblies to save time and money. Tip: Pre-load your hardware prior to connecting profiles to simplify your assembly and save time.