Extrema Ratio THE CARRY BOX — Limited Edition EDC kit with BFK EVO
THE CARRY BOX by Extrema Ratio: first release of the Holiday Equipment Series — limited edition set (500 pieces) including the numbered BFK EVO and a complete EDC kit (cap, wallet, carbon card, lanyard).
THE CARRY BOX is the inaugural drop of The Game of Six – Holiday Equipment Series, a six-part release window. This limited edition EDC kit is built around durability, refined materials and practical ergonomics, designed both for everyday carry and as a collectible.
At the heart of the box sits the BFK EVO Limited Edition (500 pieces): a compact folding knife engineered for serious EDC. Features include a Nitrogen steel Tanto blade with stone washed finish, black anodized aluminum scales, Axis Lock on bearings for fast and controlled opening, a dedicated lanyard for quick extraction and laser engravings that identify the series. The BFK EVO delivers a tangible sense of robustness and operational reliability in a discreet EDC format.
The kit also contains complementary EDC items: an Extrema Ratio Essential Cap (baseball cap with silicone patch), a Leather Zip Wallet (three-sided zip, attachment hook) and a Carbon Fiber Card (credit-card sized tool with a sharpened lower edge and ergonomic notch), plus a lanyard. These accessories are conceived for coordinated daily carry with urban aesthetics and long-lasting materials.
Concrete benefits for the end user: ownership of a numbered collectible likely to appreciate, a ready-to-use professional EDC kit, and a folding knife engineered for real-world performance in an everyday carry package.
Technical features & specifications
Product: THE CARRY BOX — Extrema Ratio (Limited Edition)
Edition run (BFK EVO included): 500 pieces
BFK EVO — technical sheet:
Weight: 85 g
Weight (oz): 2.99
Blade length: 67 mm (2.63 in)
Overall length: 168 mm (6.61 in)
Blade thickness: 2.75 mm (0.10 in)
Blade material: Nitrogen steel
Blade finish: Stone Washed
Grind: flat grind (filo piano)
Handle material: anodized anticorodal aluminum (Black)
Mechanism: Axis Lock on bearings; lanyard on butt; laser engraving on blade and clip
Included accessories: cap with silicone patch, Leather Zip Wallet, Carbon Fiber Card with notch for grip, lanyard
Intended use: everyday carry (EDC), collecting, premium gifting
Package contents
1 THE CARRY BOX containing:
1 BFK EVO Limited Edition (numbered)
1 Extrema Ratio Essential Cap
1 Leather Zip Wallet
1 Carbon Fiber Card
1 lanyard / cord
Warnings & maintenance
Do not tamper: do not disassemble or modify the knife, the carbon card, the wallet or any components; unauthorized work may impair safety, function and collectible value.
Storage: store the kit in a dry, temperate place away from heat and direct sunlight; avoid prolonged humidity that may affect metals, leather or decorative finishes.
Child safety: keep out of reach of children; contents are not toys.
Removable parts / maintenance: for the knife: periodically lubricate the pivot with recommended oil, clean the blade and metal surfaces with a soft cloth and apply a light protective oil film if needed; avoid harsh solvents on anodized or decorative surfaces. The Carbon Fiber Card features a sharpened edge—handle with care and keep it secured in the wallet when not in use. Technical servicing or repairs must be performed by authorized service centers.
Legal notice: check local laws regarding carry and use of edged tools and personal-defense items before transporting or using the Carbon Fiber Card.
These warnings and instructions comply with the GPSR Regulation and applicable Italian law.