20 Piece Kit includes Laser Cut , folded 3mm Steel Powdercoated Brackets are able to be rivetted onto the top corner of Camper trailers or Canopies to add a 'Lip' usable as both a gutter for mounting roof racks, and as tie down points for Lashdown, tie down straps - These Brackets create a perfect mounting surface for most brands of roof rack suited to gutter mount.