Product Description
The Benchmade 9400BK Auto Osborne brings push-button automatic speed to Warren Osborne's iconic reverse tanto design. Pairing a slim 3.40" CPM-S30V blade in a non-reflective Black DLC finish with green anodized 6061-T6 aluminum handle scales, a purple anodized backspacer, and an integrated spine safety, this automatic folder delivers rapid deployment and refined pocket utility.
CPM-S30V Stainless Steel is a premium powder metallurgy steel engineered specifically for cutlery applications. Hardened to 58–60 HRC, it provides exceptional edge retention, high toughness, and outstanding corrosion resistance. The 3.40" reverse tanto blade features a durable Black DLC coating and a flat grind for superior piercing strength and precise slicing performance.
- Blade: 3.40" CPM-S30V reverse tanto with Plain edge, Flat grind, Black DLC finish, 0.114" thick.
- Handle: Green 6061-T6 anodized aluminum scales; Purple anodized backspacer; Stainless steel liners & hardware; Integrated spine safety; 4.47" closed, 2.65 oz.
- Deployment + Lock: Auto AXIS push-button deployment with integrated safety switch; AXIS Lock mechanism.
- Carry: Reversible deep-carry tip-up pocket clip (right/left carry); 7.87" overall open length.
Ideal for: automatic knife enthusiasts, 940 Osborne collectors, outdoor professionals, and users requiring a slim, lightweight, rapid-deployment USA-made folder.
The Benchmade 9400BK Auto Osborne in CPM-S30V Black DLC with Green Aluminum (9400BK) ships same or next business day from Columbia, Louisiana. Knifeworks is an authorized Benchmade dealer.
Benchmade 9400BK Auto Osborne: Frequently Asked Questions
Answers to the most common questions about the Benchmade 9400BK Auto Osborne (9400BK).
How does the push-button Auto AXIS deployment work on the 9400BK?＋
Pressing the flush-mounted button automatically fires the blade open using an internal coil spring. An integrated slide safety on the handle spine locks the mechanism to prevent accidental opening in pocket or gear.
How does the 9400BK compare to the standard Benchmade 940?＋
The 9400BK maintains the identical profile, green aluminum handle, purple backspacer, and 3.40" reverse tanto blade shape as the original 940, but replaces manual thumb-stud opening with coil-spring push-button automatic deployment and adds a DLC black blade coating.
What steel is used for the 9400BK blade?＋
The 9400BK uses CPM-S30V powder metallurgy stainless steel with a Black DLC finish, heat-treated to 58–60 HRC. It provides an optimal balance of edge holding, toughness, and stain resistance for daily and tactical cutting tasks.
Where is the Benchmade 9400BK made, and what warranty covers it?＋
The Benchmade 9400BK Auto Osborne is proudly made in Oregon City, Oregon, USA. Benchmade backs the knife with their Limited Lifetime Warranty and free LifeSharp lifetime tuning and sharpening service. Knifeworks does not warranty this product independently.
CPM-S30V STEEL · BLACK DLC · GREEN ALUMINUM
The Iconic USA-Made Automatic EDC Folder
A 2.65 oz automatic folder featuring a 3.40" CPM-S30V DLC reverse tanto blade, Green aluminum handle, purple backspacer, and push-button Auto AXIS lock with safety. 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 | Automatic | |
| Brand | Benchmade | |
| Product Name | Auto Osborne | |
| Model # | 9400BK | |
| Overall Length | 7.87 in | |
| Closed Length | 4.47 in | |
| Blade Length | 3.40 in | |
| Blade Thickness | 0.114 in | |
| Blade Material | CPM-S30V | |
| Blade Hardness (HRC) | 58-60 | |
| Blade Style | Reverse Tanto | |
| Blade Edge | Plain | |
| Blade Grind | Flat | |
| Blade Finish | Black (Coated) | |
| Handle Material | Green Anodized Aluminum | |
| Handle Finish | Green | |
| Handle Thickness | 0.43 in | |
| Clip Position | Reversible Tip-Up | |
| Lock Type | Axis Lock | |
| Weight | 2.40 oz | |
| Origin | USA | |
| Blade Range | 3-3.49 |
