I think the Grip-tite featherboard has a lot more in it than meets the
eye. The magnets on these units are extremely strong. Everything on
the unit - the angle of the lexan blade, the release lever, the size of
the spring, the size and angle of the sandpaper roller -- reflects a
lot of prototyping and testing to get the balance. The rollers are
even set at a slight angle to pull the wood against the fence as you
push it forward. The steel fence plate option is a well made machined
piece, not something you would readily pick up in Lowe's.
I've used these almost daily for 10 months and sort of expected them to
show a lot of wear and tear, especially the little sandpaper rollers.
They are still like new and work as well as the first time. The
designer obviously chose some tough materials and put them together in
a nice package.
BTW, I have a Jet Supersaw with factory aluminum fence. I used a piece
of 3/4" hardwood plywood to mount the Grip-tite fence. It was pretty