Serves the purpose. Easily lost. Be Careful with Shipping Cost
I am a primary doc and use these regularly.  This does work well. The tension on the monofilament feels about right and the cover secures well.  I ordered four however about six months ago and managed to lose 3 so far because they are pretty small.  I also was shocked to pay a huge shipping fee unexpectedly- about $15 as I recall. Be careful, you don't pay the same!
Rating: 3 stars