Putco Diamond Donut adapters for 1.75" bed rails are CNC billet aluminum fittings sold in pairs to mount side rails into a toolbox. Install by drilling a measured hole, mounting the adapter with its gasket, and attaching the rail; the kit includes installation hardware and instructions. Available in chrome or black finishes, sizes accommodate multiple rail diameters and include two set screws to center the bed rail for secure alignment.
Putco Diamond Donuts - 1.75in (Pair)