Spyderco describes this item as follows:

Spyderco will undoubtedly fulfill many knife knuts knife fantasy picks with the introduction of the Endura with Emerson's patented waved opening feature. These models combine all that’s functional and performance-based in a Spyderco folder with the blade-opening feature made popular and patented by Ernest Emerson of Emerson Knives.

The Emerson waved opening feature is a hook curving out the top of the knife’s blade. When removing the knife from a front pocket it catches the pocket’s edge quickly opening the knife blade ready to use. The knife can also be taken out of the pocket without engaging the opening feature by pulling it straight up and out with your fingers on top of the closed blade.

Enduras with Emerson's patented waved opening feature have screw construction making cleaning and adjusting easier. Their gray fiberglass reinforced nylon handles are molded with Bi-Directional Texturing® for traction and improved ergonomics. Inside the handle dual skeletonized stainless steel liners strengthen the knife without additional weight and create an anchor for external and internal components to attach through for more sturdiness and rigidity. Their VG-10 blades are flat saber-ground with a stronger tip and larger 13mm opening hole. Added to the blade’s spine is slip resistant jimping. Phosphor bronze washers smooth out the open/close action and the clip is upgraded to a four-way tip-up, tip-down, left- or right-handed clip.

Specifications

• Length Overall: 8 13/16" (224 mm)
• Length Closed: 5" (127 mm)
• Hole Diameter: 1/2" (13 mm)
• Blade Length: 3 13/16" (97 mm)
• Cutting Edge: 3 7/16" (88 mm)
• Blade Thickness: 1/8" (3 mm)
• Blade Steel: VG-10
• Weight: 3.6 oz. (102 g)
• Handle Material: FRN
• Made in Japan