Reflex-Safe has a completely passive safety feature.
The needle has a silicone sleeve attached to a hard tip. The silicone sleeve acts like a spring to “push” the hard tipped blocking chamber forward as the needle is being withdrawn from the patient. This covers the needle tip and greatly reduces the risk of accidental injuries.
The outwardly flared and off-center position of the blocking chamber minimizes the chance for the needle to exit the safety sleeve without deliberate action.