EXTREMA RATIO – RAO II – BÖHLER N690

EXTREMA RATIO – RAO II – BÖHLER N690

RAO II is the new version of the celebrated Extrema Ratio RAO knife; it comes with a new drop-point blade and an improved handle, rounded at the upper corners for a more ergonomic grip. The extra safety lock effectively turns it into a fixed blade knife enabling great chopping performance with no risk of injury. The sheath can hold the knife in open position for frequent use, or in closed position inside the front pocket. It comes with a diamond-plate sharpener to always keep a perfect edge.

WEIGHT G.: 322
WEIGHT OZ.: 11,4
BLADE LENGTH (MM): 119
BLADE LENGTH (IN): 4.7
TOTAL LENGTH (MM): 263
TOTAL LENGTH (IN): 10,4
BLADE THICKNESS (MM): 6
BLADE THICKNESS (IN): 0,24
BLADE MATERIAL: BÖHLER N690 STEEL (58HRC)
BLADE FINISHING: MIL-C-13924 BURNISHING
MAIN GRIND: FLAT
HANDLE MATERIAL: ANTICORODAL ANODIZED ALUMINUM

To obtain the development of products with a high level of performance, our prototypes and samples undergo the strictest NATO tests, integrated with other more specific and even stricter tests carried out inside our laboratory. To ensure a real and absolute efficiency, we execute comparative tests with the most representative products from other firms in this sector.

Extrema Ratio uses N690 – 58 HRC Stainless Cobalt Steel in the large majority of its knives because the additional cobalt content adds strength to the blade. Suffice to say that the type of steel used to make Extrema Ratio knives makes them quite unique and very strong. The metal content of that “stainless cobalt steel” has been specifically calculated to provide steel that would hold an edge well without being so brittle that it might fracture easily – or easier than competitor knives. What make the steel unique are the higher levels of chrome and cobalt than normally found in most other steel alloys.

With the co-operation of the Facoltà di Scienze Motorie of the University of Perugia Extrema Ratio has developed a special handle called ERMH (Extrema Ratio Multipurpose Handle). The grips are a single piece cut to comfortably fit the user hand to help in maintaining a secure grip even under wet, sweaty or bloody conditions. The use of Mil-spec materials for the handles like Kraton, Forprene and special polymers add extra quality details to the final product.