By mounting the two aluminium rails you can convert your Uniko 6in1 Folding Ramp into a rigid drive-on ramp. This makes it easier to load the rear garage of your motorhome or a trailer. The two rails are placed on the side of the Uniko 6in1 Folding Ramp and fixed with cotter pins. Maximum load capacity 200kg (max. 400kg when used in pairs)