This year we took the Stryker and gave it a boost. With the new Nitrous assist opening mechanism, one of your most cherished knives just got better. The Nitrous mechnism is built directly into the liners, which propels the blade open with ease. We also upgraded to more tactile G10 handle scales, thumb studs an an overall cool new look. The 912 and 913 deliver on what it means to be a Black Class knife.Superior Quality D2 Tool Steel• Double Titanium Locking-Liners• G10 Textured Handle ScalesNitrous Assist Opening MechanismCountry of origin: USA Blade Length: 3.70"Blade Thickness: 0.125"Blade Material: D2 Tool SteelBlade Hardness: 60-62HRCBlade Style: Modified Spear-Point; Abmidextrous Thumb-StudWeight: 3.80oz.Clip: Tip Down, Removable, BlackLock Mechanism: Modified Locking-Liner w/ Nitrous Spring-AssistOverall Length: 8.25"Closed Length: 4.68"Sheath Material: Sold SeparatelyClass: Black