SOG Pentagon OTF 3.79 inch Automatic Knife - The American made Pentagon OTF is designed to meet the exacting demands of users who require a dependable one-handed, fast opening knife. SOG's Dynamic Lock-up System redefines open reliability and blade lock-up strength in OTF knives, while the CRYO S35VN blade and hard-anodized aluminum handle reinforce the durability of the knife. Pentagon OTF delivers reliable OTF technology for professional users who rely on high-end steel and technology. An OTF auto with exceptional lock-up strength Designed for professionals, law enforcement and warfighters, with its rugged aluminum handle CYRO S35VN blade SOG's Dynamic Locking System guarantee years of hard use Easy to open with either hand American-made Rattle-free solution to a problem that's plagued OTF knives for years