To the product overview:
https://www.weberusa.com/flow-drillin...

Flow drilling technology is used when vehicle construction geometries and assemblies become more complicated, only one side of the joint requires access in order to correctly install the fastener. There is no need for a large C shaped anvil on the back of the joint like other joining technologies. This is ideal for closeout or difficult to access locations where riveting is not an option. Unlike other conventional joining technologies like riveting, piercing or welding, flow screw joints are removable and repairable allowing for a greater degree of flexibility during production and during any later body repairs, should they be required throughout the vehicle life.

WEBER Screwdriving Systems Inc.
149 Knob Hill Road
Mooresville, NC 28117, USA
Tel 704-360-5820
[email protected]