Clogs, clogs, clogs, clogs....not dependable.
Absolute worst pen needle I've ever used. You get what you pay for...low cost....low dependability. The second one is a deal breaker. We diabetics need reliable consistent products to help us manage our blood sugars. These are NOT that product. I bought 2 boxes to get me through an insurance change over...after several  blood spikes, due to under delivery of insulin, when my insurance kicked in...I got my usual pen needles and threw away these.
Rating: 1 stars