The Buck Knives folding 040 Onset

For nearly 120 years Buck Knives has manufactured high-quality cutlery, from fixed blades to folding knives. Drawing on generations of experience, Buck Knives adds another EDC flipper to its stable of products with the 040 Onset.

The Buck Knives Folding 040 Onset EDC Knife

The 3.375-inch blade of the 040 Onset features a full flat grind, providing a keen edge. An ultra-smooth ball bearing pivot system glides the blade into full lockup, via a frame lock. While open, at an overall length of 8.25 inches, the flipper acts as a guard, preventing slipping onto the blade.

The S45VN stainless steel blade has a Rockwell hardness of 59-61, thanks to the Paul Bos heat treat. The Paul Bos heat treat process has a reputation throughout the industry as one of the best heat treats available. The combination of S45VN and Paul Bos heat treat add up to excellent edge retention, corrosion and wear resistance.

A textured G-10 handle scale adorns the presentation side of the 040 Onset, for enhanced retention, even when wet. The 4.875-inch closed length of the 040 Onset rides deep in the pocket via the deep carry pocket clip. The pocket clip is set up for right-hand tip up carry only and is not reversible.

The Buck Knives folding 040 Onset details

“Buck’s legacy of crafting iconic products, some over a half century in continuous production, makes it easy to forget we have a state-of-the-art facility in which we design, develop, and test our products,” said Chris Bourassa, Director of Marketing and Product Development. “The Onset is an exciting addition to our everyday carry class featuring a material and technical combination that’s tough to beat. Built, tested, and refined, every hand edged and hand sharpened 040 Onset is proudly made right here in Post Falls, Idaho.”

The Buck Knives folding 040 Onset is available now with an MSRP of $186.99. For more info, please visit

Buck Knives 040 Onset Knife Specs

Blade Material: CPM S45VN
Blade: 3.375 inches
Overall: 8.25 inches
Closed: 4.875 inches
Thick: .120 inch
Handle: Black G-10
Weight: 4.5 ounces
MSRP: $186.99

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