Finally, a "Ridge Roller" purpose made to suit radiator pipes down to a minimum
size of 25mm. This compact unit rolls a neat ridge
around your copper, brass, or steel fittings to firmly hold the hose in place.
The more pressure applied the higher the ridge becomes.
All the roller requires is a vice to be held down, no special benches,
use it and store it. In summary, this "Ridge Roller" turns a piece of pipe
into a $5.00 radiator fitting, with the added insurance of knowing that
the hose is securely held in place.