Does Rockler have intersection pieces for these? Or do you just cut them as you need them?

Manufacturer	Rockler Woodworking and Hardware
Item Weight	12 ounces
Package Dimensions	37.5 x 1.5 x 1.5 inches
Size	One Size
Material	n
Item Package Quantity	1
Batteries Required?	No

Rockler 3ft. Universal T Track – Blue T Track for Woodworking is Perfect for Workbenches, Jigs, & Machine Tables – Stacked T Slot Accepts 5/16” T-Bolts, ¼” T-Bolts - Woodworking Tools and Accessories