OK, its really called a Welby Lifestyle Suction Cup Grab Bar, and it was in my grab bag when I went on retreat. I'd been thinking of picking one up for an older relative whose having trouble getting in and out of the tub/shower. Then I learned many a quilter has held her ruler fast while using a rotary cutter - only to slice off part of a finger. Ouch! That hurts, just thinking about it! But the grab bar gets the fingers well away from the blade. I trimmed my latest project using the grab bar on my ruler. It worked great! You can lean on the bar and that ruler isn't gonna slip or slide.
After using it on my ruler, I mounted it in the bathroom, sat down in the tub and used it to get up and out. The grab bar was solid, even when I leaned my weight into it. If you've been thinking of picking one up for either purpose, this cool tool can do the job. :)