Reese Custom 5Th Whl Brkt with 10 Bolt. Custom brackets require 58058 universal rail kit. All hardware is included in the kit. Features of Reese Custom 5Th Whl Brkt with 10 Bolt 5th wheel installation guide (beds need to be at least 6' long) Reduces install time by up to 50percent 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. Package Contents: Reese Custom 5Th Whl Brkt with 10 Bolt Reese 50040-58: 50040-58 Custom 5Th Whl Brkt with 10 Bolt