"Boat or canoe dolly designed to clamp onto the rear transom of a canoe or aluminum boat, allowing the boat to easily roll to the lake, favorite hunting or fishing spot, or to storage with one person operation. Boat transom rests on the dolly which bears the weight, allowing for convenient maneuvering. The rubber coated transom bar is 8"" wide which adjusts up to 2.75"" transom thickness on the top-side, and from 1"" to 3.25"" transom thickness on the bottom end."