Under bed 5 th Wheel glider/slider hitch complete mounting system. Under Bed Railing is for short or long box will fit 2003 to 2007 Ram 2500, 3500 at the time of publication. Clamp will required new 1/2-13 Carriage Bolt. This is a no drilling installation All original installation instructions available. This is a 16,000 Lbs Trailer weight and 4,000 Lbs Vertical load weight Husky Under bed rail Model# 70630 Husky Glider Model# 70390 Husky 5 th wheel 4 way pivot head Model# 70710 This hitch was install on a 2005 Ram 3500 short box