Snow is about to fall and I gotta get the sled done. When removing the carbides there were small bars below them and I broke the threads on one so its not re-usable. I dont know if i actually need these but i cant find new ones for sale, let alone what they are. Its an '89 indy 650 with steel skis and skins. I have a pic but I cant figure how to upload it. PLEASE HELP!!!