Metal Butterfly Sprinkler Head

Have recently bought one of these with the view of buying more to water Veggie garden as they throw the water fairly high allowing the back of the garden to get water without being blocked by closer plants. However with the one I bought it has/had a tendency to jam, this was caused by the water lifting the butterfly which then hit the circular body of the sprinkler as it went around, I cured this by nipping off a little bit of the butterfly, I've had no problem since. I noticed someone else has done a review and complained about jamming, I'm guessing it's the same issue. But other than this a nice low pressure sprinkler with chromed brass body.

These are the most unreliable splinklers I have ever known. 9/10 do not work. They jam. The cheap plastic version is much better. They need to be withdrawn from the market and addressed by someone who is willing to do quality control. I know many people who agree with me.