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Double Lock
One blade, twice the safety. During standard use, the Liner-Lock automatically engages and locks the blade open. But when you need to make more rugged cuts, push the Double Lock switch forward to block the Liner-Lock from possibly disengaging and allowing the blade to close on your hand. Adjust the safety detent-action (which controls how easily the knife closes) with the tension screw on the side of the knife.
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Full-Tang
Power up your most serious cuts. COASTās knifes with Full-tang blades get the job done fastāto make heavy cutting both easier and safer.
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G10
G10 is a specialized composite made from layers of fibrous material and resin compressed under extreme pressure. COAST G10 handles include an interior steel support for durability.
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High|Medium|Low
Control your light power with the push of a button. Cycle between full light, medium light and low light options.
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Hinged Beam
Up, down, or straight ahead. All COAST headlamps feature a hinged, tilting head so that you can adjust the lightās direction and see right where youāre looking.
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Pure-Beam Focusing Optic
Pack two powerful beams into one and seamlessly transitionāwith no halos or hot spotsābetween short and long-range viewing. COASTās patented focusing technology adapts to your need. The Ultra View Flood beam delivers edge-to-edge clarity in a broad circle, and the BULLS-EYE⢠Spot Beam sends a sharp ray of light at a distance with a transitional halo around the spot to increase the effective viewing area.
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Reflective Strap
Stay visible in the dark. Some COAST headlamps feature a Reflective Strap to increase safety and ensure user visibility in low light.
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Storm Proof
Donāt worry about the weather. COAST lights that have passed the IP54-level resistance tests are splash-resistant and built with durable materials that stand up to nature.
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Tri-Color Beam
Versatility to meet broad needs. The Tri-Color Beam combines white, red, and green beams into aĀ singleĀ device. High-powered LEDs deliver all-white light for general use, red light for anti-glare and signaling, and green light for tracking.Ā
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Twist Focus
Dial in the shape of light you need for the situation. COASTās TWIST FOCUS⢠system makes it easy to move between spot and flood beams by simply rotating the head of the flashlight.Ā
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Blade Length (F401) 4 in / 10.16 cm
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Blade Length (FDX356) 3.5 in / 8.9 cm
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Blade Material (F401) 9Cr13Mov Stainless Steel
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Length Open (F401) 9 in / 22.9 cm
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Length Open (FDX356) 8.0 in / 20.3 cm
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Light Output (FL78 High) 435 Lumens
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Light Output (FL78 Low) 66 Lumens
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Light Output (FL78 Medium) 255 Lumens
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Runtime (FL78 High) 2 h 30 min
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Runtime (FL78 Low) 17 h
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Runtime (FL78 Medium) 3 h
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Weight (F401) 6.4 oz / 181.4 g