Upon first glance there is nothing about the BR-1 to make you suspect it's an auto (no button of course). In my experience 9 out of 10 people that you hand it to will NOT be able to open it until you show them where the trick spot is.
The BOLSTER slides up; this very deliberate movement is what fires the blade open and also unlocks it from the open position.
Blade Length: 3.10 inch
Blade Width: 0.83 inch
Blade Thickness: 0.110 inch
Blade Material: 154-CM Stainless
Handle Length: 4.0 inch
Handle Width: 0.45 inch
Handle Material: Thick Aluminum - deep setting pocket clip on back