Choose your ride: RedLine or BlackLine. The RedLine (BKFLEX-4001) has a clear lens with red tread bendable TPR temples. BlackLine (BKFLEX-4001S) is a smoke lens in a black glossy frame. Both deliver on the Brass Knuckle Flex promise: a face-hugging fit — one you won’t remember to take off at the end of the day. Powerful styling powers up the one-piece, lightweight, rimless design. This fully dielectric (metal-free) eye protection features naturally curved, flexible temples devoid of metal hinges and screws — excellent for linemen or others exposed to live electric current. RedLine and BlackLine feature our standard anti-fog protection.
Certifications and characteristics
Standard anti-fog protection plus abrasion, chemical, and UV resistance. Meets demanding industry test requirements (ANSI Z87.1+, EN166UV).
Clear lens allows maximum light transmission without changing or distorting vision or colors (91% of light passes through).
Smoke lens provides allover tint for normal outdoor conditions (18% of light passes through).
About RedLine and BlackLine
The bendable, flexible TPR temples provide a secure fit without creating uncomfortable pressure points, and they’re vented to improve airflow and comfort. The one-piece molded frame and nosepiece are 100% polycarbonate for strength without weight. A 9 base curve lens provides clear, crisp, and distortion-free vision and blocks 99.9% of the sun’s ultraviolet rays.
Features
Part Number | Anti-Fog | Lens Color | Frame Color | Accent Color |
BKFLEX-4001 |
Standard | Clear | Clear |
Red |
BKFLEX-4001S |
Standard | Smoke | Black | Black |
Roll Up Your Sleeves and Tear In
REDLINE BKFLEX-4001 Brochure (pdf)
Brass Knuckle Eye Protection Catalog (pdf)
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