The Clam Runner Kit was paired with a Clam Ice Fishing Fish Trap Yukon TC Ice Shelter. The Runner Kit is installed on the bottom of a Clam sled and provides additional protection and longevity to the sled itself. Pulling a sled on the ice and slow - especially frequently behind a snowmobile or 4-wheeler will beat up the sled and possibly even cause failure (holes in the sled). If you do plan to frequently tow your sled, consider this kit.
The kit does require drilling through the sled and installing screws. Since the Runner Kit is universal for many models, it wasn't molded specifically for my sled and thus I had to "bend it" into place. Installation by one person was actually quite challenging. Also, small screw heads protrude on the bottom (nested within a plastic track). I believe this creates more friction, making it harder to pull the sled manually. If you plan to pull the sled manually more than behind a vehicle, I would hold off on purchasing this kit.