For Moving And Rolling Small Fishing Boats With Ease! This durable, 1" dia., zinc-plated steel dolly will make the task of moving your boat easier on your back. Dolly clamps securely to the transom and rolls smoothly on four 7" x 1.5" rubber-tired wheels. Max. weight: 250 lbs. Transom bracket: 8.75"W x 4.25"H. Opens up to 4".