Brass Knuckles Knife – Design, Materials & Responsible Context

Learn about brass knuckles knife designs, materials and historical context. Explore engineering features, construction quality and legal awareness related to this category.

5.25 Inch OTF Knife – Machined Knuckle Trench, Matte Black

$78.77

KNUCKLE TRENCH Knife

Overall Length: 9.00“
Blade Length: 3.50″
Blade Thickness: 0.12″
Blade Steel: D2
Blade Style: Drop Point
Blade Finish: Satin
Edge Type: Plain
Handle Length: 5.50″
Handle Thickness: 0.50″
Handle Material: Aluminum
Handle Color: Black
Weight: 4.90 oz.
User: Right Hand, Left Hand
Pocket Clip: Tip-Down
Knife Type: OTF Automatic
Opener: Thumb Slide

5.25″ Machined Knuckle Trench OTF Knife – Matte Green

Original price was: $100.37.Current price is: $78.77.

OTF KNUCKLE TRENCH Knife

  • Overall Length: 9.00
  • Blade Length: 3.50″
  • Blade Thickness: 0.12″
  • Blade Steel: D2
  • Blade Style: Drop Point
  • Blade Finish: Satin
  • Edge Type: Plain
  • Handle Length: 5.50″
  • Handle Thickness: 0.50″
  • Handle Material: Aluminum
  • Handle Color: Green
  • Weight: 4.90 oz.
  • User: Right Hand, Left Hand
  • Pocket Clip: Tip-Down
  • Knife Type: OTF Automatic
  • Opener: Thumb Slide

5.5 INCH knuckle flick knife

$38.88
  • 5.5″ Knuckle Flick Knife
  • Overall Length:8.66″
  • Blade Length:3.375″
  • Cutting Edge:3.545″
  • Blade Thickness:0.13″
  • Blade: Double edge/Drop point
  • Blade Material:stainless steel
  • Handle material: Aluminum material with carbon fibre
Select options This product has multiple variants. The options may be chosen on the product page

9″ Tactical Trench OTF Knife with Knuckle Handle

$62.18

Overall Length: 9 Inches
Blade Length: 3.5 Inches
Closed Length: 5 Inches
Blade Material: 440 Stainless Steel
Blade Thickness: 2mm
Sharpness & Functionality: Sharp, Novelty Cutter
Blade Features: Spear Point Sharp Blade
Handle: Black with Carbon Fiber Inlay
Other Features: Out The Front, Switch Toggles In and Out, Glass Breaker
Finish: Black and Silver Blade, Black & Carbon Fiber Inlay

Automatic Dual Action Knuckle Trench OTF Knife

$71.99

Automatic Dual Action OTF Knuckle Trench Knife

Overall Length: 9″
Blade Length: 3.5″
Handle Material: Zinc Alloy
Blade Material: 440C Stainless Steel
Blade Style: Double Edge Spear Point
Weight: 15 Ounces
Color/Design: Chrome w/ Carbon Fiber Inlay
Nylon Sheath Included

Biker Style OTF Knuckle Knife – Blue Graphic Handle

$62.18

BIKER Knuckle OTF Knife

Overall Length: 9 Inches
Blade Length: 3.5 Inches
Closed Length: 5 Inches
Blade Material: 440 Stainless Steel
Blade Thickness: 2mm
Sharpness & Functionality: Sharp, Novelty Cutter
Blade Features: Spear Point Sharp Blade
Handle: Gold with Carbon Fiber Inlay
Other Features: Out The Front, Switch Toggles In and Out, Glass Breaker
Finish: Black and Silver Blade, Gold & Carbon Fiber Inlay

Brass Knuckles knife

$51.88

Brass Knuckles knife

Total Length: 9.8cm
Blade Length: 3.2cm
Blade Width: 6mm
Blade Thickness: 1mm
Blade Material: 440C
Handle Length: 6.6cm
Handle Material: Zinc Alloy
Handle Width: 35mm
Handle Thickness: 7mm
Net Weight: 25g

Punisher OTF Knuckle Knife – Black Skull Handle

$62.18

PUNISHER OTF Knuckle Knife

Overall Length: 9 Inches
Blade Length: 3.5 Inches
Closed Length: 5 Inches
Blade Material: 440 Stainless Steel
Blade Thickness: 2mm
Sharpness & Functionality: Sharp, Novelty Cutter
Blade Features: Spear Point Sharp Blade
Handle: Gold with Carbon Fiber Inlay
Other Features: Out The Front, Switch Toggles In and Out, Glass Breaker
Finish: Black and Silver Blade, Gold & Carbon Fiber Inlay

Punisher Skull OTF Knuckle Knife

$62.18

Punisher Skull OTF Knuckle Knife

Overall Length: 9″ Inches
Blade Length: 3.5″ Inches
Handle Material: Full Aluminum Zinc Alloy
Blade Style: Spear Point
Weight: 10 Ounces
Color/Design: Black w/ Punisher Skull
Nylon Sheath w/ Belt Loop
Glass Breaker Stub
Pocket Clip

Red Trench OTF Knuckle Knife – US1918 Style

$62.18

Red Trench OTF Knife US1918

Red Trench OTF Knife Us 1918 -TKK238-011

Overall Length: 9 Inches

Blade Length: 3.5 Inches

Blade Material: 440 Stainless Steel,

Powder coated black finish

Blade Style: Dagger

Handle Length: 6 Inches Handle

Material: Cast metal, Heavy duty construction

Includes: Pocket Clip, Glass breaker, belt sheath.

Tactical OTF Trench Knuckle Knife

$62.18

TRENCH KNUCKLE KNIFE

  • You Will Receive 1 – Choose An Option
  • High Quality Knuckle OTF
  • Smooth Double Action Opening
  • 440 Stainless Steel Blade
  • Full Aluminum Handle
  • Rubber Texture On Handle
  • Pocket Clip
  • Glass Breaker Stub
  • Overall Length 9″ Inches
  • Blade Length 3.5″ Inches
  • Includes Nylon Sheath w/ Belt Loop

What Is a Brass Knuckles Knife – Design & Engineering Perspective

A brass knuckles knife merges a gripping form with an attached blade. The design combines structural strength with ergonomic considerations to create a compact tool that historically has appeared in various cultural contexts. From an engineering perspective, understanding how handle contours, weight distribution, and blade integration work together helps illustrate general principles of mechanical design and form factor optimization in compact tools.

Materials, Construction Quality & Functional Features

Brass knuckles knife designs typically use durable metals — such as brass, stainless steel, or alloy steels — paired with robust handle materials that provide rigidity and balance. Precision machining and finishing processes affect the overall surface quality and structural stability. These materials and construction choices are shared across many high-quality handheld tools, reflecting careful selection for durability, corrosion resistance, and tactile comfort.

Historical & Cultural Context of Folding & Integrated Grip Tools

Tools with integrated grip profiles (such as braced handles or unique hand-fitted designs) have evolved in different cultures for a variety of purposes, including utility tasks and symbolic representation. Examining the historical and cultural influences behind forms like the brass knuckles knife helps contextualize how tool shapes change over time and adapt to new materials, manufacturing techniques, and aesthetic trends.

Legal Awareness & Responsible Understanding

Regulations covering objects like a brass knuckles knife vary widely by country, state, and local jurisdiction. In many regions, certain configurations of handheld knives and grip-reinforced tools are regulated or restricted. It is essential for visitors to research and comply with the applicable local laws before acquiring or handling any such item. Understanding these legal frameworks supports responsible awareness and ensures tools are handled in appropriate and lawful settings.

Integrated Grip & Handle Design Principles

The ergonomic grip design seen in brass knuckles knife-style profiles emphasizes secure handling and structural contact with the hand. These design choices are found in a variety of compact handheld tools where comfort, control, and balance are important—such as multi-purpose utility tools, hiking implements, and mechanical tool handles.

Blade Integration & Structural Balance

Integrating a blade into a handle with significant surface area requires careful mechanical design. Blade thickness, tang construction, pivot mechanics (in folding versions) and handle reinforcement all contribute to consistent performance and structural soundness. These principles are applied across many engineered folding mechanisms found in tools.

Material Selection & Finishing Quality

Metals used in brass knuckles knife constructs — such as brass, stainless steel, or high-strength alloys — are selected for their mechanical properties. Surface finishes like polishing, matte coating, bead-blasting or anodizing enhance both tactile feel and resistance to environmental factors. Attention to material properties and finishing techniques reflects broader craftsmanship considerations in quality tool design.