What steel is in the Victorinox Fibrox Pro Boning Knife Straight Narrow VN5640315BK?

The VN5640315BK uses Victorinox's proprietary high carbon stainless steel, ice-tempered for hardness and laser-tested for edge consistency at the factory in Switzerland. Ground at 15 degrees per side, it is thinner and finer-cutting than most German-made boning knives at this price. The high carbon content holds a working edge through extended butchering sessions; the stainless composition resists corrosion in wet kitchen environments without the maintenance carbon steel requires.

Is the Victorinox Boning Knife VN5640315BK made in Switzerland?

Yes. The VN5640315BK is manufactured in Switzerland by Victorinox, who have produced professional kitchen knives there since 1884. Every blade is ice-tempered and laser-tested for edge geometry before leaving the factory. Swiss manufacture is not a marketing claim on this knife -- it is the production standard that makes Victorinox the most commonly issued brand in culinary schools worldwide.

Is the Victorinox Boning Knife VN5640315BK flexible or rigid?

The VN5640315BK is a straight, rigid narrow boning knife -- it does not flex. This is the right choice when you need the blade to hold its line precisely: portioning fish fillets, deboning chicken breasts, removing silverskin from a tenderloin, or any flat precision cut where blade deflection would cost you meat or accuracy. If your work involves navigating hip joints, shoulder sockets, or curved rib contours, the Victorinox Narrow Flex boning knife is the better tool for that application.

Is the Victorinox Fibrox handle on the VN5640315BK NSF certified?

Yes. The Fibrox handle is NSF-certified for commercial kitchen use -- the handle material and seamless bolster-to-blade transition meet food safety standards for sanitation with no crevices for bacterial accumulation, and it is rated for repeated high-temperature dishwasher cycles. This is the reason Victorinox Fibrox knives are the most commonly issued blades in NSF-required commercial kitchen environments and culinary school programs.

What is the blade length and overall length of the Victorinox VN5640315BK?

The VN5640315BK has a 6.00-inch blade with an overall length of 11.50 inches. The narrow straight profile keeps the blade tip precise and responsive without the width of a standard boning knife getting in the way on tight cuts. At approximately 2.40 oz, it is light enough for extended use without hand fatigue, and the Fibrox handle's ergonomic taper keeps grip consistent through long butchering sessions.

What is the difference between the Victorinox Straight Narrow and the Narrow Flex boning knife?

Both knives share the same Swiss-made high carbon stainless blade steel, NSF-certified Fibrox handle, 15-degree hollow grind, and 6-inch narrow profile. The difference is blade flexibility. The Straight Narrow (VN5640315BK) is rigid -- the blade holds its line, making it the right choice for flat precision work: fish fillets, chicken breasts, tenderloins, silverskin removal. The Narrow Flex (VN6841315) has enough give to bend around bone contours -- the right choice for hip joints, shoulder sockets, rib cages, and wild game processing. At $21.95 vs. $37.99, the Straight Narrow is also the more affordable entry into the Victorinox Fibrox Pro boning lineup.

ProTech LG405-SBR Grip Milled Black, 2.5" S35-VN 2-Tone Plain Blade, Aluminum Handle

Pro-Tech Les George SBR Short Blade Rockeye Automatic LG405 — 2.5" 2-Tone CPM-S35VN, CNC Milled Black Aluminum

SKU: PTLG405- 29

Pro-Tech Knives

$290.00 $225.00

(You save $65.00)

Current Stock:

Out Of Stock

Overview
Warranty Information

Product Description

The Pro-Tech Les George SBR LG405 is a compact automatic designed by Marine Corps knife maker Les George — a smaller, pocket-optimized version of the full-size Rockeye Auto that preserves every element of the original's hard-use ergonomics. The 2.5-inch CPM-S35VN clip point blade carries a 2-tone finish: stonewashed bevels for toughness and wear resistance, machine satin flats for a clean, refined appearance. Don't let the size mislead — the SBR deploys with the same coil spring authority as Pro-Tech's larger automatics.

The 6061-T6 aluminum handle is CNC milled with a grip-textured spine and pocket milled details that add both traction and visual depth. Hard coat anodized black throughout, with blasted hardware and a black DLC deep-carry clip. At 6.5 inches overall and 3.0 oz, the SBR is as capable a carry knife as the platform gets in a compact format. Built in Placentia, California by Pro-Tech Knives. Ships same or next business day from Knifeworks.

Blade: 2.5-inch CPM-S35VN clip point — 2-tone finish (stonewashed bevels, machine satin flats), plain edge, 0.125-inch thick
Handle: 6061-T6 aluminum — hard coat anodized black, CNC milled grip texture, pocket milled spine, blasted hardware
Deployment: Push-button coil spring automatic — fast, authoritative deployment
Carry: Black DLC deep-carry tip-up clip, right-hand, 3.75-inch handle length, 0.50-inch thick
Dimensions: 6.5 in overall · 2.5 in blade · 3.0 oz
Designer: Les George — Marine Corps knife designer, ergonomic hard-use geometry
Origin: Designed, engineered, and hand-finished in Placentia, California by Pro-Tech Knives

Specifications:

Product Type	Automatic
Brand	Pro-Tech Knives
Product Name	Les George SBR Automatic
Model #	LG405
Overall Length (in)	6.5
Closed Length (in)	3.75
Blade Length (in)	2.5
Blade Thickness (in)	0.125
Handle Thickness (in)	0.50
Blade Material	CPM-S35VN
Blade Style	Clip Point
Blade Edge	Plain
Blade Finish	Stonewash/Satin
Handle Material	Aluminum
Handle Finish	Milled Grip Pattern
Handle Color	Black
Clip Position	Tip-Up, Right Carry
Opener	Push Button
Lock Type	Button Lock
Weight (oz)	3.0
Origin	USA
Blade Range	2-2.99

Warranty Information

Pro-Tech Knives Limited Lifetime Warranty: This knife is warranted to the original owner to be free from defects in materials and craftsmanship by Pro-Tech Knives, LLC. Covered: replacement parts and labor only. All knives returned for warranty consideration must include $15 for return handling and postage and a completed service request form. Factory sharpening to a razor-sharp edge is included with warranty service. Not covered: normal wear and tear, damage caused by neglect, misuse or abuse, failure to perform normal maintenance, blade finishes or coatings worn by normal use, damage from improper sharpening, accidental damage, non-factory modifications, or damage from improper disassembly. For warranty service, contact Pro-Tech Knives directly at protechknives.com.

Product Videos

Custom Field

Product Type Automatic

Brand Pro-Tech Knives

Product Name Les George SBR Automatic

Model # LG405

Overall Length (in) 6.5

Closed Length (in) 3.75

Blade Length (in) 2.5

Blade Thickness (in) 0.125

Handle Thickness (in) 0.50

Blade Material CPM-S35VN

Blade Style Clip Point

Blade Edge Plain

Blade Finish Stonewash/Satin

Handle Material Aluminum

Handle Finish Milled Grip Pattern

Handle Color Black

Clip Position Tip-Up, Right Carry

Opener Push Button

Lock Type Button Lock

Weight (oz) 3.0

Origin USA

Blade Range 2-2.99

Product Reviews

Frequently Asked Questions

What is the Pro-Tech Les George SBR and how does it differ from the full-size Rockeye?

The SBR — Short Blade Rockeye — is a compact version of the Pro-Tech Rockeye Auto, sharing the same Les George ergonomic design and Pro-Tech coil spring automatic mechanism in a smaller package. Where the full-size Rockeye runs a longer blade for heavier cutting tasks, the SBR scales to a 2.5-inch blade and 3.75-inch handle for deeper, more discreet everyday carry. Both versions deploy with the same authority and are built to the same specifications in Placentia, California.

Who is Les George and what is his connection to the SBR?

Les George is a custom knife maker and former Marine Corps infantryman whose designs are shaped by real hard-use requirements. His knives are known for strong ergonomics, aggressive geometry, and practical functionality rather than aesthetic novelty. The Rockeye and SBR represent his collaboration with Pro-Tech Knives — Pro-Tech translates his custom designs into production automatics built to their precision manufacturing standards.

What is the 2-tone blade finish on the LG405?

The 2-tone finish on the SBR LG405 combines stonewashed bevels with machine satin flats. The stonewash on the bevels creates a matte, wear-resistant surface that hides scratches and reduces glare on the cutting edge geometry. The machine satin on the flats produces a smoother, slightly reflective finish that contrasts cleanly with the stonewash and highlights the blade's flat geometry. The combination is both functional and visually distinctive.

What is CPM-S35VN steel?

CPM-S35VN is a Crucible Particle Metallurgy stainless steel that has become a benchmark for production carry knives. It delivers a well-balanced combination of edge retention, toughness, and corrosion resistance — holding a working edge through extended daily use while remaining straightforward to sharpen with standard equipment. It improves on CPM-S30V with better toughness and easier sharpening without giving up meaningful edge retention.

What is hard coat anodizing on the aluminum handle?

Hard coat anodizing is an electrochemical process that converts the outer layer of aluminum into a dense aluminum oxide coating. It is significantly harder and more wear-resistant than standard anodizing, providing better scratch resistance and durability for a handle that sees daily carry and use. On the SBR LG405, the hard coat anodized black finish is applied over 6061-T6 aluminum that has been CNC milled with a grip texture pattern on the spine.

Where is the Pro-Tech Les George SBR made?

The SBR LG405 is designed, engineered, and hand-finished in Placentia, California by Pro-Tech Knives. Pro-Tech has manufactured American-made automatic knives in small batches since 1999, individually hand-fitting and finishing each knife in-house.