The Spyderco Sage3 knife features a Bolt Action Lock collaboration with Blackie Collins. The lock operates by way of a button on the side of the handle connected to a steel bar which slides in and out behind the blades pivot. The motion of opening the blade moves the bolt, compressing a spring and propelling it forward into a space between the blade and the frame, locking the blade open. As envisioned by its inventor, the mechanism provides maximum strength and lightness.
The Sage 3 has a flat ground S30V stainless steel blade and blue G-10 handle scales with a reversible wire pocket clip.