Fix RAILING foot :

Attachment systems fitted to the original side bars of your vehicle

 OU

Fix Point foot :

Attachment systems fitted to the original attachment points of your vehicle

OU 

Fix ROOF foot :

Attachment systems fitted to the edge of the roof of your vehicle by clipping

+ 

Cross bar Aluminium :

4 zinc-plated high-strenghth steel tube references

1st stage :

attach the feet on the bars

2nd stage :

adjust the distance

3rd stage :

attach the bar on the roof