i ordered a flash 1 and man, i was dissapointed with the sheer smallness of it. i knew it was gonna be on the small side, but for someone with average size hands, it's just not comfortable to hold. if you drilled a hole through the handle you could put it on a keychain. it's that small. as far as the SAT, I now think it's unnessasary. there is a safety switch(also miniscule) that needs to be clicked over in order to engage the blade. sure enough, the blade flicks open with just a nudge, but i felt it would open in my pocket with the safety off. it's not solid either. i returned it. if you are into this flash series, then go with the bigger model. or better yet.. the mini x ray vision is one of the best working and best looking knives i've owned.