Benchmade Boost 590BK – 3.70" Black CPM-S30V Drop Point Assisted Opening Folding Knife
The Benchmade Boost 590BK is the black blade version of Benchmade's full size Boost, pairing a 3.70" black coated CPM-S30V drop point with the AXIS Assist mechanism and integrated slide safety. The dual durometer handle wraps a dark gray Grivory core in a black Versaflex overmold for a secure, shock absorbing grip. Benchmade has discontinued the Boost line, and this page stays current for owners and collectors researching the model. Going Gear is an authorized Benchmade dealer.
Benchmade Boost 590BK Specifications
| Specification |
Detail |
| Brand |
Benchmade |
| Model |
Boost 590BK |
| SKU |
BCM-590BK |
| Blade Length |
3.70" |
| Blade Steel |
CPM-S30V stainless, 58-60 HRC |
| Blade Finish |
Black coating |
| Blade Style |
Drop point, plain edge |
| Blade Thickness |
0.120" |
| Overall Length |
8.52" |
| Closed Length |
4.83" |
| Weight |
4.59 oz |
| Handle Material |
Black Versaflex over dark gray Grivory, dual durometer |
| Lock Type |
AXIS Assist with slide safety |
| Made In |
USA (Oregon City, Oregon) |
| Knife Type |
Folding knife |
Frequently Asked Questions
What does BK mean on the Benchmade Boost 590BK?
The BK suffix on the Benchmade Boost 590BK refers to the blade, not the handle. The 590BK carries a black coated CPM-S30V drop point blade on the same black and gray dual durometer handle as the satin blade Boost 590.
What is the blade length of the Benchmade Boost 590BK?
The Benchmade Boost 590BK (BCM-590BK) has a 3.70" black coated CPM-S30V drop point blade with a plain edge, matched to an 8.52" overall length and a 4.59 oz carry weight.
What steel does the Benchmade Boost 590BK use?
The Benchmade Boost 590BK uses CPM-S30V premium stainless steel at 58-60 HRC. The black coating adds glare reduction and extra corrosion protection on top of S30V's already strong stainless properties.
Is the Benchmade Boost 590BK an automatic knife?
No. The Benchmade Boost 590BK is an assisted opening knife. The AXIS Assist mechanism completes the opening after a push on the thumb stud, and a slide safety keeps the blade locked closed. Assisted openers are treated differently from automatics under most knife laws, but always confirm your local rules.
What is a Blue Class Benchmade knife?
Blue Class was Benchmade's name for its everyday carry tier, and the Benchmade Boost 590BK was a Blue Class model. The label has been retired, but these knives came from the same Oregon City, Oregon production line as Benchmade's current knives.
Does LifeSharp cover the Benchmade Boost 590BK?
Yes. The Benchmade Boost 590BK is covered by Benchmade's LifeSharp lifetime service. Benchmade will clean, tune, and resharpen the knife for free for its whole service life, discontinued or not.
Where can I buy the Benchmade Boost 590BK?
The Benchmade Boost 590BK is discontinued, so availability is limited to remaining dealer stock and the secondary market. Going Gear is an authorized Benchmade dealer and stocks the current Benchmade lineup, including modern black blade EDC alternatives.
