The one most people should buy. Two independent arms instead of one handle, which means real clamping force and a container that doesn't work loose on corrugations.Specifications Handle Twin independent arms Fits Every RotoPax and FuelpaX container Included 4" disc plate Stacking Yes — this is the mount RotoPax recommends for stacking Warranty 1 year Standard vs DLX vs LOX Standard One T-handle. Budget option. DLX Two independent arms, more clamping force. The one to buy if you're stacking two containers. LOX Two arms plus a lock cylinder — but not compatible with extensions, so no stacking. Maximum stack is two containers, and the extension you need is determined by the bottom can, not the top.Why the RotoPax pattern mattersThis interface is a de facto industry standard. Dozens of manufacturers build brackets to it — our own Heavy-Duty RotoPax Spare Tire Mount, plus Front Runner, Eezi-Awn, Leitner, Axia Alloys, Xtrusion, TrailRax and RockSlide.