bar! Designed to bolt on to our 4105 winch bumper, this nerf bar is made from precision bent 1.75" DOM tubing with laser cut flanges and gussets. Bolt on design ensures quick and easy fitment. This part is only compatible with the 4105 winch mount, and makes a perfect upgrade for existing winch mount owners looking to increase its usefulness. Works great with light mounts designed to clamp 1.75" tubing.