O.T.L. DEFENDER

Name: O.T.L. DEFENDER
Brand: Extrema Ratio
SKU: 04.4300.0100/OLD

The one-touch lift visor systema has been projected and developed entirely by Extrema Ratio.
The operator can lift the visor using one single hand, only pressing a button.
The system was designed to be removed quickly with just a few moves, but at the same time it is a securely fixed to the helmet.

Acquista from Extrema Ratio

Extrema Ratio quality: known worldwide, proudly Made in Italy

Fast shipping: to your home in 24/48 hours, from the headquarters.

Secure payments and purchases: buy from the original website.

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To buy this model please contact a knife reseller in your area or contact us at [email protected]
Following Italian laws, double edge and/or automatic knives are considered weapons. For this reason they cannot be sold on-line. Please get in contact with a knife shop in your area to buy them.

Description

Progettato interamente dallo staff Extrema Ratio, questo meccanismo permette all'operatore di sollevare la visiera utilizzando una sola mano con la semplice pressione di un pulsante.

Weight (ounces): 63,14/69,84
Visor material: TRANSPARENT PMMA AND POLYCARBONATE WITH INTERLAYER
Visor anchor brackets material: STEEL
Position locking gears material: TEMPERED STEEL
Operating buttons material: DELRING

Download the brochure

Use

PROFESSIONAL OPERATIONAL DEPLOYMENT

Extrema Ratio develops knives engineered for real-world applications, where control, precision, and reliability are essential requirements. Every model is designed to ensure stable ergonomics, proper balance, and consistent performance, even during prolonged use. Use the tool strictly according to its technical function, avoiding improper use or stress beyond its intended scope. Mindful use preserves safety, efficiency, and longevity, keeping structural and operational characteristics of the product intact.

Want more details? Check the complete guide.

Care

ESSENTIAL ROUTINE MAINTENANCE

Regular maintenance is fundamental to preserving the efficiency, reliability, and lifespan of your product. After each use – especially in the presence of salt water, humidity, mud, or grease residues – rinse with fresh water, dry thoroughly, and apply a suitable lubricant to metal parts and moving mechanisms. Periodically inspect the inside of the sheath, removing sand, dust, or abrasive particles that could damage the blade finish when sheathing or unsheathing.

Want more information? Check the complete guide.

Warranty

OFFICIAL ASSISTANCE AND WARRANTY

Extrema Ratio knives are covered by a lifetime warranty covering defects in workmanship, materials, or treatments that compromise functionality. Sheaths are guaranteed for two years from the first documented purchase. Upon verification of a recognized defect, the product will be professionally repaired. If non-restorable, the tool will be replaced with an identical new product. Should the specific model be unavailable, it will be replaced with the most similar product in terms of technical features and overall value to ensure your complete satisfaction.

Want more details? Read our warranty information.

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