Cottley Twister Tile Spacer Levelling System 50 Screws, 50 Nuts (50 Whole Units)

So simple to use and remove and so effectivel

Been laying floor tiles for great many years. I was, for some reason, tempted to use these for a large area of exterior 20mm porcelain flags. Firstly, they are not effective at levelling. A large tile (600 x 600) will adhere to the the mortar base on contact and the "screws" are not strong enough against the suction and pull the tiles into line - they break ! A wedge system is far more effective. Secondly, the action of screwing down the large top nut will actually push the tiles apart - a right pain ! Thirdly, when you are trying to follow the desired drainage slope ( e.g. 1:80) these large screws clutter up the floor space and simply get in the way on levels and string lines. All in all, not worth the money and I sold mine on e bay - I should have followed the reviews by landscape tilers on You*ube!

Weren’t strong enough to use on 20mm slabs, most of them snapped and didn’t pull up level. When trying to remove they snapped off at the top and left them poking out of the grout lines causing a lot of stress to remove and damaged some of the porcelain. Wouldn’t recommend!

clips to soft but is ok

I wouldn't bother buying any more. They work with 20mm porcelain tiles... just. But a bit too fragile and more hassle than it's worth.