Product Description
The Benchmade Full Immunity 290BK-1 delivers high-performance cutting power and tactical ergonomics in a compact, sub-2.5-inch footprint. Engineered for discreet everyday carry and restricted-length compliance, this ultralight 2.29 oz folder pairs a 2.49" CPM-M4 super steel Wharncliffe blade with an anodized Flat Dark Earth (FDE) 6061-T6 aluminum handle and Benchmade's ambidextrous AXIS Lock mechanism.
CPM-M4 Tool Steel is a high-vanadium powder metallurgy steel renowned for extraordinary wear resistance, impact toughness, and class-leading edge retention. Hardened to 60–62 HRC, the 2.49" Wharncliffe blade features a non-reflective Black DLC (Diamond-Like Carbon) coating for enhanced corrosion protection and a flat grind for precise utility slicing.
- Blade: 2.49" CPM-M4 Wharncliffe with Plain edge, Flat grind, Black DLC finish, 0.090" thick.
- Handle: Flat Dark Earth (FDE) anodized 6061-T6 billet aluminum scales; Lanyard cord included; 3.46" closed, 2.29 oz.
- Deployment + Lock: Dual thumb studs for ambidextrous opening; AXIS Lock mechanism.
- Carry: Reversible deep-carry tip-up pocket clip (right/left carry); 5.94" overall open length.
Ideal for: EDC users in blade-length restricted jurisdictions, tactical operators needing a compact folder, and buyers seeking maximum CPM-M4 edge retention in an ultra-compact manual folder.
The Benchmade Full Immunity in CPM-M4 Black DLC with Flat Dark Earth Aluminum (290BK-1) ships same or next business day from Columbia, Louisiana. Knifeworks is an authorized Benchmade dealer.
Benchmade Full Immunity: Frequently Asked Questions
Answers to the most common questions about the Benchmade Full Immunity FDE Aluminum (290BK-1).
What is the blade shape and length on the Full Immunity?＋
The Full Immunity features a 2.49-inch Wharncliffe blade profile, providing a straight cutting edge and a precise point for controlled utility slicing and detail work in restricted-length jurisdictions.
What steel is used for the 290BK-1 blade?＋
The 290BK-1 features CPM-M4 powder metallurgy tool steel hardened to 60–62 HRC with a Black DLC coating, providing extraordinary edge holding and wear resistance.
How does the AXIS Lock work?＋
The AXIS Lock uses a hardened steel crossbar that slides forward into place over the blade tang when opened via the dual thumb studs. It provides a rock-solid, fully ambidextrous lockup that allows smooth one-handed opening and closing.
Where is the Benchmade 290BK-1 made, and what warranty covers it?＋
The Benchmade Full Immunity is proudly made in Oregon City, Oregon, USA. Benchmade backs the knife with a Limited Lifetime Warranty and free LifeSharp lifetime tuning and sharpening service. Knifeworks does not warranty this product independently.
CPM-M4 STEEL · BLACK DLC · FDE ALUMINUM
The Compact USA-Made EDC Folder
A 2.29 oz folder featuring a 2.49" CPM-M4 Black DLC Wharncliffe blade, Flat Dark Earth aluminum handle, and AXIS Lock. Questions? Our team carries these knives daily. We ship same or next business day from Columbia, Louisiana.
Call 888-225-9775
Warranty Information
Benchmade Warranty: Benchmade warrants that its genuine products are free from defects in material and workmanship for the life of the product. The warranty does not cover normal wear and tear, rust, accidents, misuse, improper maintenance, or alterations. Benchmade offers free lifetime LifeSharp services for sharpening and inspection. Contact Benchmade directly for warranty and LifeSharp support. Knifeworks does not warranty this product independently.Specifications
| Product Type | Folding Knife | |
| Brand | Benchmade | |
| Product Name | Full immunity | |
| Model # | 290BK-1 | |
| Overall Length (in) | 5.55 in | |
| Closed Length (in) | 3.06 in | |
| Blade Length (in) | 2.49 in | |
| Blade Thickness (in) | 0.110 in | |
| Blade Material | CPM-M4 | |
| Blade Hardness (HRC) | 58-60 | |
| Blade Style | Wharncliffe | |
| Blade Edge | Plain | |
| Blade Grind | Hollow | |
| Blade Finish | Black | |
| Handle Material | Aluminum | |
| Handle Finish | Flat Dark Earth | |
| Lock Type | Automatic | |
| Clip Position | Tip Up, Reversible | |
| Weight | 2.40 oz | |
| Origin | USA | |
| Blade Range | 2-2.99 |
