Does exactly what you would expect.
These arrived (quickly) and are sturdy enough to keep weights in place without slippage. I've used them to hold 2 3Kg's in place without issue. 4 in a pack is handy but would prefer to see 6 as I see very few divers with only 2 weights! - means you probably have to buy more than one pack but, as inexpensive, no harm to have a few spares.
Rated 4 out of 5