Nylon Fendermate Fendermate is the latest in fender brackets. Clamps securely on both 7/8" and 1" round tubing and 3/16" and 1/4" life line wire. Unique double locking action locks the clamp on the rail or wire while still allowing full adjustment of the height of the fender. When the proper height is reached, the final locking action clamps the rope quickly and securely. Constructed of marine grade reinforced injection molded nylon.