1Enhanced Loading Assistance: The trailer roller bow stop features built in grooves that help center your boat as you load it on your trailer. It simplifies the loading and unloading process. 2Keel Support and Protection: This 195mm trailer roller bow stop provides smooth, non marring, and resilient protection for the keel of your boat. 3Efficient Boat Launching Aid: The boat trailer roller aids in efficient loading and launching of your boat, acting as an assistant to center your boat on the trailer. 4Heavy Duty Protection: The protective rollers are designed for heavy duty use. They offer additional safeguard to your watercraft when being loaded on or off your trailer. 5Resilient PU Construction: The roller bow stop is made from long lasting PU construction. This enhances its durability and makes it impervious to sunlight, chemicals, and fuels. 1 xTrailer Roller Bow Stop