I haven't had the need for a pendulum since I've been stationed out west, but I used to shoot the keller and loved it. It had a screw to lock it in place for shooting on the ground, and a red light to illuminate your pins at dawn and dusk. As long as you were between 20-30 feet off the ground it preformed flawlessly. I took several deer from east centralAlabama using mine without ever a second guess. Just put your pin behind the shoulder and let it rip. When I make it back to whitetail country I'll be sure to purchase another.