Patagonia Foot Tractor Bar Replacement – Danner, Fish long enough in your Foot Tractor Wading Boots and youll eventually wear down the traction. Which means its time to celebrate all the good times youve had in themand then order the Foot Tractor Aluminum Bar Replacement Kit. Each kit contains 8 small and 6 large bars, 22 screws and the wrench to make it all happen.Available in four sizes: S(5-6), M(7-9), L(10-12), XL (13-14)