I found one these at a yard sale and taped it to the end of a painters extension pole. With this setup fully extended I can reach the highest leaves easily. I keep it sharpened with an angle grinder using a 3" Roloc attachment with 36 grit grinding disc, or sometimes I just hand file the edge. I find that the 36 grit grinding disc works best because it leaves a bit of a serrated edge. I also use it to notch the back of the psuedo stems when harvesting the bunches.