Benchmade Design Nitrous Stryker Combo Edge Knife with Steel Tanto Blade Blade Length: 3.70" Overall Length/Closed Length: 8.25" / 4.68" Blade Material/Hardness: D2 Tool Steel/ 60-62 HRC Blade Style: BK Coated Modified Tanto with Serrated Blade Section; Ambidextrous Thumb-Stud Lock Mechanism: Modified Locking-Liner w/ Nitrous Spring-Assist