It make a very coarse spray. Also, it is recommended to be mounted at 48" and they are a little short of that. I tried them out Saturday and no blow back on me. Yes, they are for fence rows and for some steep ditches too steep to drive on. I will not use them when the boom is adequate. Its just another tool for me to save time. I considered mounting them under the side tanks much lower but still protected, but would not do as good of a job for me. I'll try to post a video of their operation.