with Mounting Bolt: 12 in keel roller assembly kit with mounting bolt:4.19"(L) x 0.46"(W).Dimensions of mounting slots:5"(L) x 1/2"(W).If the attached mounting bolts not fit your trailer's holes, need to prepare additional bolts
Premium Material: Made of heavy duty galvanized bracket and sturdy black rubber keel roller. Can slide smoothly during towing,reduce friction and wear between the vessel and the trailer,extend service life of the boat and trailer
Easy to Install: The boat trailer roller with modular design is easy to install,disassembly and adjust for position
Improve Work Efficiency: Just roll on with little effort to launch the boat in water or pull the boat out of the water,saving time and labor costs
Versatile Applications: The bow roller is widely use for a wide range of boats like kayak,yachts,canoe,fishing boat,commercial vessel,ect.