USMC Linerlock A/O Black U. 4.5" (11.43cm) closed. 3.38" (8.59cm) black oxide coated 3Cr13MoV stainless blade. Black anodized aluminum handle. Extended tang. Pocket clip. Boxed. Specifications for USMC Linerlock A/O Black USMA3009BK: Manufacturer: USMC Blade Length: 3.38 in Closed Length: 4.5 in Blade Material: 3CR13MOV Stainless Steel Knife Application: Tactical Everyday Carry Pocket Knife Serrated: Plain Overall Length: 7.8 in Handle Material: Anodized Aluminum Handle Length: 4.5 in Handle Color: Black Handle Finish: Anodized Aluminum Blade Finish: Black Oxide Blade Grind: Fine Edge Opening Method: Spring Assisted Package Type: Box Color: Black Blade Type: Folding Blade Package Contents: USMC Linerlock A/O Black