Of the S.A.T. line the ones that can be locked open are our lockback assisted opening knives, the Blink, Twitch I, Twitch II and Twitch XL. All of these knives have a lock on the lockbar that can be used to prevent it from releasing the blade in the open position.
The other S.A.T. knives, the Flash and Trident, only lock in the closed position. I hope this helps explain the differences for you.
Chris