Review by: spoon, 2010-09-29
The gym where I work uses these exclusively. There is an internal stop that prevents the sleeve from moving any farther once it has made it to the locked position. After repeated use, the stop fails and the sleeve continues to screw upwards. After a while it will go far enough to expose the threads on the gate, allowing ing them to be damaged. If you keep using it, the stop becomes worn enough that you can screw the sleeve off the carabiner entirely. Metolius replaced our carabiners when this happened. The second batch failed exactly the same way.