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The only things I've been unable to grip with mine are objects in which either:
A. ...the surface is SO covered with particulate matter (e.g. covered in sand, dust, powder/flour, etc.) that the device is unable to form a seal, or...
B. ...something whose surface is not only irregular, but is also too porous to draw a vacuum against (roll of carpet, pile of pumice stone, a screen door, etc.), or...
C. ...something whose surface isn't capable of supporting itself under any circumstances anyway (a pool of water, a pile of gravel, etc.)
...and you know what? That's all TOTALLY FAIR.
One doesn't pick up one of mankind's most effective electromagnets and then grouse about it ""not working on non-metallic items"", or one of the world's most-powerful acids, only to whine about it being ""unable to dissolve glass,"" either (or, at least, not without getting promptly lumped into the category of ""humans I hate on principle"").
I CAN lift plywood, drywall/sheetrock/gypsum board/hardiback, tile, granite, marble, glass, metal of any sort, appliances, floor tools, cabinets, furniture... and gods only know what else I've yet to discover and/or simply haven't thought to experiment with yet! Yanno the old saw about ""it's not heavy, it's just awkward!""? It's genuinely shocking how true that actually is. We were able to move a California King mattress wrapped in plastic with NO problems. It was EASY with something to actually get a positive grip on.
Hell: I was able to stick ONE of them to a finished ceiling, HANG PULLEYS from its integrated mounting brackets, and use IT, in turn, to HOIST A 90lb dust collector EIGHT FEET UP A WALL, then REST IT ATOP A SECOND ONE stuck to a bloody FINISHED INTERIOR WALL, tie off the rope, and leave it there - supported only by their respective suctions - until I had time to climb a ladder and lag bolt it in - OVERHEAD, AND BY MYSELF.
Izzy Swan - genius inventor and all-around roaring badass - has done some really, REALLY cool brainstorming videos surrounding the use of them, too (I'm not affiliated in any way, just trés impressed):
youtu.be/dNxj8_S4inQ
youtu.be/sYwtIWYpPvQ?t=12
So has Andrew Klein (equally-genius, equally-badass-of-the-roaring-variety):
youtu.be/V4P-MRnRROE
Yes: they're expensive. But, I assure you: you'll be stunned how many applications around the shop you're likely to find.
One person found this helpful
I'm very impressed with the quality of this canvas bag. It's the perfect solution for my GRABO tools and I love the double zipper design.
The GRABO Pro (4 Pack) is a game changer! I have never been able to lift and move such heavy objects with such ease. I am extremely impressed with this product and highly recommend it.
Liam Jackson –
The charger is built like a tank and doesn't overheat even when you're using it nonstop. Its super easy to pack and take with you. If you need a reliable charger for traveling, this one’s a no brainer.