The 9 hole - wide slotted inside corner bracket is an external fastening method that creates a 90 degree connection. One side of the bracket has three adjacent holes and the second side has six holes comprised of two rows and three columns. The three adjacent holes are slotted, allowing for a larger degree in adjustability between connecting profiles. This bracket requires no machining services and can provide infinite positioning along the profile T-slot. It engages the 2-degree drop-lock feature when the assembly bolts are tightened to the required torque. The suggested mounting hardware can be found on the "Suggested Hardware" tab.