R2 Manufacturing's product support is the best I've encountered in a long time! Last January I received 2 #ET3 Edge Tamers for my cabin tractor. Used them very little. This season one started coming loose. The hole through the nut was 'funny'...not stripped per se...but the threads were rounded and the hole wallowed out. Tried chasing the threads to no avail. The bolt threads were fine. Contracted the Henning brothers who sent a new #ET3 edge tamer. No questions, no hassle, not haggle, no argument. That, my friends, is superior product support! You can buy with confidence from R2 Manufacturing.