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 TR-5 Tactical Response 5 (T501) - 3.25" S35-VN Stonewash Plain Blade, Black 6061-T6 Aluminum Handle - New Steel Safety

Pro-Tech TR-5 Automatic Black T501 — 3.25" Stonewash CPM-S35VN, Black Aluminum, Glass Breaker

SKU: PTT501- 87

Pro-Tech Knives

$320.00 $250.00

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Overview
Warranty Information

Product Description

The Pro-Tech TR-5 T501 is the standard-configuration Tactical Response 5 — a push-button automatic built for dependable, no-nonsense performance. The 3.25-inch CPM-S35VN blade in stonewash finish delivers the steel's proven balance of edge retention, corrosion resistance, and ease of sharpening in a surface that wears gracefully and shows less daily use than polished or coated finishes.

The push-button automatic mechanism deploys fast with solid lockup, and a slide safety blocks the button for secure carry between uses. The integrated steel glass breaker at the butt adds emergency utility without changing the carry profile. Black aluminum keeps the handle lightweight and low-profile, and a deep-carry pocket clip tucks the knife discreetly in the pocket. Built in Placentia, California by Pro-Tech Knives. Ships same or next business day from Knifeworks.

Blade: 3.25-inch CPM-S35VN — stonewash finish, plain edge
Deployment: Push-button automatic with slide safety — fast, authoritative single-action lockup
Safety features: Slide safety + integrated steel glass breaker
Handle: Black aluminum — lightweight, low-profile, deep-carry tip-up pocket clip
Origin: Designed, engineered, and hand-finished in Placentia, California by Pro-Tech Knives

Specifications:

Product Type	Automatic
Brand	Pro-Tech
Product Name	Tactical Response 5
Model #	T501
Overall Length (in)	7.625
Closed Length (in)	4.375
Blade Length (in)	3.25
Blade Thickness (in)	0.125
Blade Material	CPM-S35VN
Blade Style	Drop Point
Blade Edge	Plain
Blade Finish	Stonewash
Handle Material	Aluminum
Handle Color	Black
Handle Thickness (in)	0.48
Opener	Push Button
Lock Type	Button Lock
Clip Position	Tip-Up, Right carry
Weight (oz)	3.5
Origin	USA
Blade Range	3-3.49

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

Product Name Tactical Response 5

Model # T501

Overall Length (in) 7.625

Closed Length (in) 4.375

Blade Length (in) 3.25

Blade Thickness (in) 0.125

Blade Material CPM-S35VN

Blade Style Drop Point

Blade Edge Plain

Blade Finish Stonewash

Handle Material Aluminum

Handle Color Black

Handle Thickness (in) 0.48

Opener Push Button

Lock Type Button Lock

Clip Position Tip-Up, Right carry

Weight (oz) 3.5

Origin USA

Blade Range 3-3.49

Product Reviews

Frequently Asked Questions

What is the Pro-Tech TR-5 T501?

The Pro-Tech TR-5 T501 is the standard black configuration of the Tactical Response 5 — a push-button automatic with a 3.25-inch CPM-S35VN blade in stonewash finish, black aluminum handle, slide safety, and integrated steel glass breaker. It is the core TR-5 configuration built for dependable everyday automatic performance without specialized finishes or limited-run features.

What is CPM-S35VN and how does it perform as a carry 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, making it one of the most practical steels available at this price point.

What does the slide safety on the TR-5 T501 do?

The slide safety is a physical lock that blocks the push button from being depressed, preventing the blade from deploying during carry. With the safety engaged, the knife cannot be fired even under pressure. It sits on the handle spine and is operated with the thumb — safety on for carry, disengaged when the knife needs to be deployed. It is the standard carry configuration for any push-button automatic.

What is the glass breaker on the TR-5 T501?

The TR-5 features an integrated steel glass breaker at the butt of the handle — a hardened steel point designed to shatter tempered glass in emergency situations such as a vehicle entrapment. It is a fixed, non-removable feature built into the TR-5 platform across configurations, adding emergency utility without changing the knife's carry profile or overall dimensions.

Is the Pro-Tech TR-5 T501 legal to carry?

The TR-5 T501 is a push-button automatic knife, and automatic knife laws vary significantly by state and municipality. Many states permit ownership but restrict public carry. It is the buyer's responsibility to verify the laws in their state, city, and any jurisdiction they plan to carry before purchasing. Knifeworks does not provide legal advice on knife carry laws.

Where is the Pro-Tech TR-5 T501 made?

The TR-5 T501 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.