They sound like the Sigma ones that I've been using over the past couple of years (cost a couple of quid for a pack of two)Johnny Thin said:I wouldn't use them - mine keep snapping unexpectedly. This happened to me last Friday when I didn't have any spares, luckily found a shop nearby. They gave me a different sort with 2 pins on the same side which you bend towards you to clip the plate in opposite.
You've been very unlucky! I have never heard of any others round here that have failed on either mtbs or road bikes over the past 10 years. Infact, chain 'snapping' has become a thing of the past since using SRAM links, as there is no weakening associated with removing the chain for periodic cleaning.I wouldn't use them - mine keep snapping unexpectedly.