VERSACHOCK 25" Four Roller Kit with Four Wide Wheels VersaChock s Four Roller Kitassists loading watercraft onto swim platforms and docks. It is designed for use with VersaChock brand edge roller kit (VCROLLER25). Four, large 5", self-adjusting poly rollers conform to hull shapes from 0 to 24 degree deadrise. The 3" center roller protects the keel. Roller assembly is easily removable using the included threaded deck plates for a trip-free deck. VersaChock s VCROLLERWINCH/VCWINCHPLATE kit s can be added when manual loading may be difficult. It also works great with VersaChock s exclusive blind fastener system (VCBLINDFSNTR) when access to the backside of mounting surface or a second set of hands is not available. #10 oval head screws required for installation (not included). Dimensions (apx.) - 25" L x 10.9" W x 6.8" T. #10 mounting screws not included. Threaded deck plates/backing plates included