I used the beader to make new beads on 5/8 I.D. formed tubes that came with an Airwolf oil filter kit. I suspect the tube supplied by Airwolf (which I had to shorten and therefore put a new bead on the cut end) is a fairly hard alloy of aluminum. The tool struggled a bit but with careful work and gradual step-ups in the amount of beading force applied, it did the job, made a useable bead. The joint does not leak. Nice tool, well made, struggles with hard tubes but prevails in the end.

Great product and design - poor sales details - the 3/8 easy beading tool DOES NOT FIT with the standard wall thickness 3/8 AL fuel lines used in many/most aircraft. This was a waste of money for me, unless I want to drill out the fuel line to a thinner wall thickness to accept this tool.

This is really the first substandard product I have received from Aircraft Spruce, and it is not up to aircraft standards - maybe OK for cars or plumbing. I definitely would not recommend it.