T Joining Plate for 2020 Aluminum Extrusion

From the shop's description

These heavy duty mounting plates are perfect for any project requiring connection strength. Features 4mm Thick with M5 diameter screw holes on 20mm spacing Dimensions 60 x 60mm V-Slot aluminum bars series compatible 6105-T5 Clear Anodized Aluminum Can be mounted to V-Slot rail using 8 or 10mm screws