I have two hi lift jacks one works good the other would drop all the way when I try to let it down. I layer it on the truck bed and looked it over good to try to see what's going on. Somehow the slide was pulling both pins out and it would fall. Finally I took the up-down lever off and took the slide out and left them off. The jack works good without them. It goes up just by working the handle. To let it down I just alternate pulling the pins with my left thumb while working the handle. One could tie a wire to the pins if needed but it's easy to use your thumb. Don't scrap your jack! 100 percent safe.