Why not just pick up the rock? If you're strong enough to carry it with one hand then you can lift it with two. I get the idea but if you can't lift a rock easily due to its dimensions then isnt it already too big to be lifted? Something like this would be better for maybe a glass pane or a tile you cant get your fingers around... these rocks are easily grabbed

Lol i was wondering the same thing. Looks cooler than hand pumping the paddles that glazers generally have though I suppose

I bet a lot of guys want that kind of suction for other jobs... What? I meant construction work! 😮😅

Pointless... Thanks.