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When you want hardworking protection and not a lot of frills, choose StraightLine. Ultra lightweight and fully dielectric, Straight Line has squared-off, rimless lenses and a rectangular temple vent, advancing the clean, linear impression. Max-rated impact protection is achieved through a denser optical center featuring a 2.2 mm-thick core. StraightLine’s longer temples help ensure superior comfort, and their thinner polycarbonate construction — unlike nylon — provides the flexibility to fit virtually any wearer without causing distortion to the base curvature. With its state-of-the-art design completed by a high-gloss finish, StraightLine simply shines. 

Certifications and characteristics 

Standard anti-fog protection plus abrasion, chemical, and UV resistance. Meets demanding industry test requirements (ANSI Z87.1+, EN166UV, CSA Z94.3, and CE EN 166). 

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 the StraightLine

Fully dielectric with no metal anywhere, StraightLine is ideal for electricians or anyone working near or with live current. Features include translucent, high-gloss, smoke-colored temples and rimless design to give clean lines throughout. The two-piece lens design offers excellent optical quality for clear vision. A molded nosepiece and longer, vented temple provide a secure and comfortable fit. StraightLine’s tough, ultra-light 100% polycarbonate construction offers impact resistance and blocks 99.9% of the sun’s ultraviolet rays. 


  • Dielectric (no metal components) 
  • Ultra-lightweight, weighing less than one ounce 
  • Two-piece lens design in clear or smoke 
  • Extended temple length for better fit 
  • Vented temple 
  • Molded nosepiece 
  • Integrated side protection 
  • ANSI-rated hardcoated polycarbonate lenses 

Part Number Anti-Fog Lens Color Frame Color Accent Color
Standard Clear Black N/A
Standard Smoke Black N/A

Roll Up Your Sleeves and Tear In

BKFIX-3020 Brochure (pdf)

Brass Knuckle Eye Protection Catalog (pdf)