Price range: $211.00 through $226.00
BD4 LUCKY is a new basic folder with double guards Opening System and serrated blade.
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.
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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.
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WARRANTY
OFFICIAL ASSISTANCE AND WARRANTY
Extrema Ratio knives are covered by a lifetime warranty against defects in workmanship, materials, or treatments that compromise their functionality. Sheaths are guaranteed for two years from the date of the first documented purchase. In the event of a recognized defect, the product will undergo a technical inspection and, where possible, be repaired. Should it prove non-restorable, the tool will be replaced with an identical, brand-new item. If the model is no longer available, it will be replaced with the most similar product in terms of features and value.
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