The North Mountain Blade CHOP 4 (2412-BLPR) is the flagship front flipper that helped ignite the front flipper trend worldwide. Revered in Asia with over 50,000 units sold, the CHOP 4 blends Japanese blade artistry with modern engineering to create a folding knife that’s both elegant and high-performance.
At its core is a 3.5-inch Japanese-style tanto blade crafted from SLD-Magic Japanese steel, forged in a three-layer San Mai construction with beautiful visible wave patterns. This blade offers 60–61 HRC hardness, outstanding edge retention, and exceptional slicing performance, all while showcasing a traditional hamon line that highlights its craftsmanship.
The blue and purple ceramic carbon fiber handle scales give this knife a bold, refined aesthetic while keeping it lightweight and durable. The front flipper mechanism, paired with ceramic ball bearings, delivers incredibly smooth and fast deployment for effortless one-handed operation.
Clean lines, purposeful design, and premium materials make the 2412-BLPR a standout piece — whether in your pocket or collection.
Key Features
3.5" SLD-Magic San Mai Japanese-style tanto blade with hamon wave pattern
Front flipper action on ceramic bearings for smooth, quick deployment
Blue & purple ceramic carbon fiber handles for strength and striking aesthetics
Exceptional edge retention (HRC 60–61) and traditional flat grind
Minimalist, refined design without unnecessary embellishments
Legendary model with over 50,000 units sold worldwide
Specifications
Feature
Details
Brand
North Mountain Blade
Model Name
CHOP 4
Model Number
2412-BLPR
Product Type
Folding Knife
Opening Mechanism
Front Flipper
Overall Length
≈ 8.25 in
Blade Length
3.5 in
Blade Material
SLD-Magic San Mai Japanese Steel
Blade Style
Japanese-Style Tanto
Blade Grind
Flat
Blade Finish
Belt Satin with Hamon
Hardness
60–61 HRC
Handle Material
Blue & Purple Ceramic Carbon Fiber
Locking Mechanism
Liner Lock
Pivot Assembly
Ceramic Ball Bearings
Clip Position
Tip-Up
Dexterity
Ambidextrous
Designer
North Mountain Blade Team
Country of Origin
China
Intended Use
EDC / Collection / Tactical
Feature Highlights
3.5" SLD San Mai tanto blade forged with traditional Japanese methods
Visible hamon line highlights layered steel construction
Front flipper mechanism for smooth, one-handed deployment
Distinctive blue & purple ceramic carbon fiber handles
Exceptional hardness (60–61 HRC) for excellent edge retention
Minimalist, purposeful design — legendary 2412 flagship model
Ideal for collectors, enthusiasts, and everyday carry users
