The tanto series fixed blade knives signed by Extrema Ratio, saw its debut with the T3000 line - now discontinued - and took new forms with the T4000 line which, in its compact version, is a good tactical back-up.

The T-Razor, a new product which was presented at IWA 2015, follows the welcome back to tradition that has recently inspired Extrema Ratio.

The BF2 V is the first folding boat knife developed by Extrema Ratio, and its launch took place on the Italian training ship, Amerigo Vespucci.

Following the success of the first version produced by Extrema Ratio in 2006 of the 185 ° Reg.RAO, the eponymous knife renews its form with the new version, the RAO II.

The N.K.1 is the first neck knife produced by Extrema Ratio, which completes the tactical knives series made by the famous brand from Prato (Italy).