How They Work and Why They are Unique
By adding or removing flexural rods of same or different diameters in different configurations, you change the pressure to flex-ratio. In other words, you control how much the sander flexes. These sanders will pick out lows that your hand or naked eye almost always miss.
In the example above you can see how the number of rods inserted effects the stiffness of the sander. This allows you to go from sanding the fender of a 1940 Chevy to the hood of a 1965 Lincoln in a matter of seconds. Each sander comes with a set of vinyl end caps to prevent the rods from sliding around and to prevent unwanted scratches when working in tight areas.
How They're Made
The base plate on the 4.5", 9", 15", 21" and 27" sanders is made from 1075 tempered spring steel. It ranges in thickness from .008 to .020" depending on sander length. The base plate on the 36" sander is a little thicker, made from .060" thick aluminum, (around 16 gauge). The flexural rod chases within the sanders are made from polyethylene and the foam handle is made from the finest foam available.
What Type of Sandpaper Does it Use?
Use adhesive backed sandpaper, or a type of spray adhesive to apply the sandpaper. AFS Sanders don't have clips because clips don't keep the sandpaper attached to the bottom of the sander as well. Spray adhesive won't allow the paper to be drawn into the lows while your sanding.
The AFS Sander Story
The first thing you see in a street rod is the paint job. The Adjustible Flexibility Sander (AFS) was invented to create a flawless finish without spending countless hours sanding. Originally created for the automotive industry, these sanders have found favor by carpenters and hobbyists as well. Not only are they great for the professional, but amateurs have also been doing wonders with them.