There's a barbecue cart - I guess you could call it that - on a neighbor's place by the river. It has a grate that is moved up an down by a big metal wheel. I've been fascinated with this wheel for years and although I have made several attempts, I have failed at getting a good image of it. Yesterday, I decided to ignore the wheel and focus on another part of the apparatus. This is a clip that holds the grate to the frame.