I used these on one of my smaller Marshall 4 x 12 guitar cabinets Makes it very easy to get in and out of nightclubs and saves you having to lug the cab back to your car. I wish the wheels were a bit stiffer and the wheels don't take bumpy tarmac or slick concrete pavement. If you've ever had an anvil body with slightly larger wheels, you know what I'm talking about. Overall a good buy!