Reese Towpower 50040-58 Fifth Wheel Quick Installation Kit 5th wheel installation guide (beds need to be at least 6' long) Reduces install time by up to 50% Custom Brackets only require (58058) Universal Rail Kit All hardware included Kits with -58 are the 10-bolt kits complete with rails, mounting hardware and the custom bracket kit. Kits with -24 are the 4-bolt kits complete with rails, mounting hardware and custom bracket kit.