Extrema Ratio BD4 Lucky Black (04.1000.0497/BLK) – Italian elegance in a tactical pocket format
Extrema Ratio BD4 Lucky Black combines classic Italian design with the durability of professional knives. This folding model with an elegantly shaped blade and a burnished black finish is designed to be a reliable companion in tactical situations as well as for everyday carry. Opening via the flipper system is fast and precise, with protective blade guards increasing safety during use. If needed, the knife can be completely disassembled for cleaning and maintenance – manufacturer-designed modularity combined with the strength of the aluminum handle ensures high functionality and long service life.
📐 Technical parameters
Closed length: approx. 157 mm (6.18″)
Edge: Partial serration (~20 mm) – a combination of a plain edge and a finely serrated section of the blade
Blade finish: MIL‑C‑13924 burnishing – black matte finish
Clean the knife after use, especially the internals and the flipper.
Apply a drop of quality oil to the pivot and lock.
For sharpening, use a flat sharpening stone for the plain edge and small ceramic stones for the serrated section.
BD4 Lucky Black delivers the feeling of true handcrafted heroism. This knife is designed for owners who seek performance, robustness, and simplicity in one package – without unnecessary extras. It is a piece of sophisticated engineering that will not disappoint in any situation.
Extrema Ratio BD4 Lucky Black is a robust and elegant tactical knife that performs in any environment. Thanks to its reliability, low weight, and easy maintenance, it is an excellent choice for EDC users who appreciate Italian design and military-grade quality. A welcome option for anyone looking for performance in a discreet package.
