I thought the round "edge bumpers" would would have met our customers needs for protecting their precious chair arms quite well!
:-) And very convenient too ... if you like a tire in the lap.
:-) I love the possibilities spring base design gives: from "adjustable height" - just add some heavy "subject/object" to the table, to pressing at one end to get whatever is on the opposite side without getting up! Imagine time saved, productivity increased! Endless possibilities.... :-)
Oh yes! If your pencil rolls away, you just push down and it rolls on back. :-)