Hi Dean, interesting, steel wedges are totally prohibited for use here (B.C. home of the big trees) because of contact danger with chainsaws. Back in the old days when there were two man falling teams they used sledgehammers and 14" long slim steel wedges. Steel wedges for splitting firewood are have way to steep of an angle, they will be spit out. I bought some magnesium? wedges at a garage sale and used them to fall some birch leaners, I just beat the snot out of them with my 41/2lb. axe, trees went over. Pounding the snot out of wedges on other kinds of trees with questionable holding wood is just asking for the holding wood to snap and the tree to come over backwards. Falling against thier lean callls for common sense, you cannot get to carried away, sometimes even good falllers have to leave money trees cause its just not going to happen. In this case run up the tree and hang a rope. If you are determined to use steel wedges you will probably have to get some made, not hard to do by a shop. Slim wedges are easier to drive, copy a plastic falling, not bucking wedge.