Spyderco Endura 4 FRN KnifeSpyderco Endura 4 FRN (fiberglass reinforced nylon) handles come in new vibrant tones including blue, green, brown, gray and purple. Molded onto the handle's surfaces is Bi-Directional Texturing for slip-free tactile traction. Inside the handle are dual skeletonized stainless steel liners which strengthen the knife without additional weight and double as an anchor for external and internalcomponents to attach through generating more sturdiness and rigidity.The blades are full flat-ground VG-10 with a thinner highly refined cutting edge and a 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.Flat-ground Endura Lightweights are produced in limited numbers as part of the 2010 production line up. Specifications: Handle Color: Blue. Length Overall: 8 3/4 in. (222 mm). Blade Length: 3 3/4 in. (96 mm). Blade Steel: VG-10. Length Closed: 5 in. (127 mm). Cutting Edge: 3 7/16 in. (88 mm). Weight: 3.4 oz. (96 g). Hole Diameter: 1/2 in. (13 mm) Blade Thickness: 1/8 in. (3 mm) Handle Material: FRN. Contents: Spyderco Endura 4 FRN Knife.