Bed rail size for T Slot Nuts

So I drilled the 20x20 extrusions instead I drilled a 732 hole through the 20x20 at positions along the length that matched the position of

Think of it as t-track tic-tac-toe, with three horizontal pieces instead of two , and the vertical pieces can slide and lock anywhere along the

tslot fastener These fasteners are required to mount the towers if you have a bed rail or a tonneau cover from (Pace Edwards, Rugged Ridge, TruXedo, or the Hyundai Santa

tyco slot car FEATURES Length:400 mm Width:180 mm Height:15 mm Weight:1379 g Internal Width: mm Internal Height: mm Slot Width: mm External Width:180 mm