FB39 Sustain

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The FB39 Sustain is a large fixed blade, designed to 'sustain life'

Appearance in catalogs

The FB39 Sustain appeared in the following catalogs:


Stuart Ackerman

History, mentionings etc. from the forums

Information from the Spyderco catalog on the web

FB39 Sustain

Custom knifemaker Stuart Ackerman is a South African native who currently lives in New Zealand. A veteran of extensive military combat service, he knows from harrowing personal experience what a knife really needs to do in the field and incorporates that real-world insight into every one of his designs.

Ackerman originally designed the Sustain to meet the needs of a group of daring sportsmen who hunted wild pigs with only a knife and a small pack of dogs. He also wanted it to be a highly functional all-purpose cutting tool well suited to “sustaining life” by helping to make fire, build shelter, and prepare food.

The heart of the Sustain is its broad six-inch blade, which features a sturdy saber grind and a long swedge (unsharpened back bevel). It is expertly crafted from Crucible® CPM® 20CV—an advanced particle metallurgy stainless steel that contains a high volume of chromium and vanadium. This potent combination gives it a remarkable combination of high wear resistance, superior corrosion resistance, good impact toughness, and excellent polishability.

For maximum strength, the Sustain features full-tang construction capped by contoured, polished G-10 scales that are secured by blind pins. The handle’s ergonomic profile includes a substantial integral guard and subhilt to protect the user’s hand from sliding forward, a flared butt to maintain positive control when chopping, and a large lined lanyard hole for easy attachment of safety cords or lanyards. A handsome traditional leather pouch-style sheath completes the package and allows convenient carry on the belt.[1]


The FB39 is made in Taiwan and features:

SKU Handle Edge Steel From/To MSRP Note Number made Grind Sheath Clip Collectors club
FB39G Black G-10 PE CPM-20CV 2013 - $310.00 (2020) Hollow grind Leather Belt loop Main

Most collectible variation

The original FB39 Sustain, complete with original box and papers in mint condition, is likely to be the most collectible version.

Questions regarding collecting the FB39

Some interesting questions we are looking for an answer to:

Questions with an answer:

Technical information

Measurements (mm and grams) of the FB39 Sustain:

Variation Length overall Length blade Length edge Blade thickness Weight
FB39G 292mm 157mm 152mm 3.0mm 207g

Measurements (inches and ounces) of the FB39 Sustain:

Variation Length overall Length blade Length edge Blade thickness Weight
FB39G 11.50" 6.19" 6.00" 0.118" 7.3oz


  1. The FB39 Sustain in Spyderco's online catalog


The FB39 Sustain