Kit includes Custom Mounting Brackets, ISR HD Base Rails, And Hardware. Designed for use with PullRite Heavy Duty Super 5th and SuperGlide hitches, but may also be used with any industry standard hitch. Please note, in order to determine the total tow of a system, you must consider the weight ratings of each component in that system. This includes, but may not be limited to, the rating of the tow vehicle, the fifth wheel hitch, and the hitch's mounting system. Actual tow of the system will be equal to the lowest rated component.