Slide-in T-nut loads from the profile ends. It creates a strong, durable connection. An essential for working with slotted aluminum extrusion, these t-nuts slide into the side-slot of aluminum extrusion profile. Works with 6mm, 10 series 1" profiles. Slide in T-slot nuts are used to attach plates, brackets, and other parts to aluminum extrusions using matching bolts (not included).They are inserted into the end of the extrusion and create a strong connection. Item Dimensions (LxWxH) 0.49 x 0.43 x 0.17 inches. Compatible with 80/20 3205, 3204 t-nut & 10 Series Aluminum Extrusion Profiles. Available with 1/4-20 and 10-32 Tap