The Front Runner Single Jerry Can Holder is designed to be mounted perpendicular ACROSS 2 slats. If you'd like to mount a single jerry can holder PARALLEL to the slats, you will need to use these brackets.Since many of today's new jerry cans vary ever so slightly is size (due to manufacturing discrepancies), most fuel can mounting systems fail to secure the cans properly. There is often wiggle room between the carrier and the can. And that gap, however slight, causes rattle and wear. What's the point in strapping down your cans if they aren't truly secure?The Front Runner jerry can holders offer a smart no rattle no wear solution. The adjustable locking steel clasp means your cans can be secured firmly in place over a lifetime of off-road abuse.For use with 20l / 5.3 gallon NATO/Wedco style military cans. Will not work with Scepter style cans.The new bolt on top strap means provides greater convenience when removing the jerry can.In addition, the steel strap downs cover the jerry can cap. Add your own padlock and you'll never have to worry about stolen fuel while on the road.The Front Runner single jerry can holder is made of black powder coated stainless steel and is designed to easily bolt to the Front Runner Roof Racks using the flat slotted slats in the rack.If a parallel, between slats placement is preferred this can be done with the use of Inter-Slat Brackets - by Front Runner.