I misplaced my previous trolley when I put it away for the winter. Saw this one on Amazon. It arrived quickly and just as described. I use a locking carabiner and attach a number of different types of rides depending on the rider. I have a hammock chair with a seatbelt, a kid's swing with over the shoulder security, and a tire swing for older children and adults. The trolley rides smoothly on my 1/4" cable that goes between a walnut tree and a cherry tree. For braking, I've installed 4 - 36" compression springs at the bottom, so the trolley can't get to the end. It makes for a fun and popular backyard.