The BD4 Lucky Black is a mid-size folder designed for users who want a compact yet dependable everyday tool. The Böhler N690 blade (58 HRC) with MIL-C-13924 blackening provides corrosion resistance and a subdued appearance; the flat grind combined with a 20 mm partial serration makes the knife versatile for both precise cuts and tasks requiring extra cutting bite.

Built on a robust frame with anodized anticorodal aluminium scales, the BD4 keeps weight low (137 g) while offering solid handling and reliable opening/locking action. Its materials and geometry emphasise control, easy carry and long service life.

Concluding sentence: a well-balanced folder that pairs quality materials with a practical design for a reliable, refined everyday carry option.

Technical features & specifications

Weight: 137 g (4.83 oz)

Blade length: 123 mm (4.84 in)

Overall length: 280 mm (11.02 in)

Blade thickness: 3 mm (0.11 in)

Blade material: Böhler N690 (58 HRC)

Blade finish: MIL-C-13924 blackening

Grind: flat / plain edge

Partial serration: 20 mm (0.78 in)

Handle material: anodized anticorodal aluminium

Category: folding / EDC

Package contents

1 × BD4 Lucky Black folding knife

Warnings & maintenance (GPSR / EU compliant)

Do not tamper with, modify or adapt the knife in any way; unauthorised alterations may impair safety, performance and legal compliance.

Intended use: cutting tool designed for lawful EDC, light outdoor tasks and general utility; always confirm local laws concerning possession and carry of knives.

Storage: keep the knife folded and stored dry, away from heat and humidity; avoid prolonged exposure to direct sunlight.

Keep out of reach of children and unauthorised users.

Disassembly/servicing: any work on pivots, screws or locking mechanism should be performed by qualified personnel; do not disassemble unless experienced.

Maintenance: clean and dry the blade after use; apply a light protective oil to metal surfaces to prevent corrosion; sharpen with appropriate tools and maintain the correct edge angle. Periodically check screw tightness and lock function.

Safe handling: maintain secure grip during cutting operations; avoid sudden movements near others and do not use the knife for unintended tasks.

Disposal: dispose of worn or broken parts in accordance with local regulations for metal waste.

These warnings comply with the General Product Safety Regulation (GPSR) and applicable Italian/European law.