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
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3.5" SLD-Magic San Mai Japanese-style tanto blade with hamon wave pattern
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Front flipper action on ceramic bearings for smooth, quick deployment
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Blue & purple ceramic carbon fiber handles for strength and striking aesthetics
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Exceptional edge retention (HRC 60–61) and traditional flat grind
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Minimalist, refined design without unnecessary embellishments
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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
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3.5" SLD San Mai tanto blade forged with traditional Japanese methods
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Visible hamon line highlights layered steel construction
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Front flipper mechanism for smooth, one-handed deployment
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Distinctive blue & purple ceramic carbon fiber handles
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Exceptional hardness (60–61 HRC) for excellent edge retention
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Minimalist, purposeful design — legendary 2412 flagship model
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Ideal for collectors, enthusiasts, and everyday carry users
