Base 1sf

The 5.11 Tactical Base 1SF is a minimalist keychain knife purpose-built for professionals and everyday carry users who demand reliable blade access without bulk. Designed for law enforcement, military personnel, and tactical operators, this compact edged tool fills the critical gap between a full-size folder and backup blade—delivering genuine cutting capability in a form factor that rides unnoticed on your keychain. The one-handed thumbstud opening mechanism ensures immediate deployment during high-stress situations or routine tasks.

Engineered for dependable performance, the Base 1SF features a 1.5-inch sheepsfoot blade forged from 8CR13MOV stainless steel—a proven material that balances edge retention with corrosion resistance in field conditions. The sheepsfoot profile prioritizes control and safety, making it ideal for cutting tasks where tip durability matters more than piercing capability. A robust frame lock secures the blade in the open position, preventing accidental closure under load while maintaining the knife's ultralight profile at just 0.1 pounds. At under 4 inches closed, this tool integrates seamlessly into any tactical loadout or daily carry configuration without adding appreciable weight or pocket burden.

Military personnel, off-duty officers, and serious EDC enthusiasts benefit most from the Base 1SF's no-compromise blade design and instant accessibility. Whether deployed in austere environments, carried as a backup tool during duty shifts, or used for routine cutting tasks, this keychain knife performs without hesitation. Its compact dimensions (2 x 0.25 x 5.5 inches) make it the ideal secondary blade for professionals who already carry a primary knife, or a standalone solution for minimalist operators who refuse to compromise on capability. The frame lock design and quality stainless steel construction ensure years of reliable service across demanding applications.