Wild Country Synergy Keylock Twistlock Autolock
Here's what other sites are saying:
There are some situations where its absolutely necessary to be sure your screwgate is closed - so also available for the safety conscious or for more select applications comes our full Autolock Synergy. This has a three stage mechanism that makes sure it must be deliberately opened and then when its let go it closes and autolocks itself - meaning that theres no more worrying about accidental unlocking. As with the standard screw it uses the same 12mm round bar construction, keeping a smooth profile for ropes, and enabling it to be used with a Munter hitch and a wider range of knots. A perfect group or centre biner.
- Ramsey Outdoor