A classic Spyderco knife, the Endura 4 features a flat saber-ground VG-10 steel blade, a black FRN Bi-Directional Textured lightweight handle, four-way clip option, screw-together construction, skeletonized steel liners, phosphor bronze washers, sturdy back lock with David Boye Dent, spine jimping, and an enlarged thumb hole for easy one-handed opening. Blade length: 3.75". Open length: 8.5". Closed length: 4.75". Weight: 2.9 oz. 376560: Limited quantity. A slight variation of the classic Endura 4, this model includes the Emerson Opener feature. This hook deploys the blade quickly and effortlessly when pulling it from your pocket. The FRN handles are a unique dark grey.