Two Mounting Brackets are required minimum and will be used to Mount Box to Truck Deck or Trailer Deck. This Kit comes with One sets of brackets and Mounting Bolts, Washer and Nuts and Installation Sheet.
Weight carried in box will determine how many brackets are needed to mount box!
For Installation Instruction see our Installation Catalog:
Description Sheet: www.truckbox.com/images/PDF21/T-Page 33.pdf