{"product_id":"tc21-titanium-four-finger-knuckle-duster-aerospace-grade","title":"TC21 Titanium Four Finger Knuckle Duster - Aerospace Grade Stonewash 15mm","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch3\u003eAerospace-Grade TC21 Titanium Knuckle Duster\u003c\/h3\u003e\n\u003cp\u003eThe TC21 Titanium Four Finger Knuckle Duster represents the absolute pinnacle of titanium alloy engineering. Forged from TC21 - an ultra-premium near-alpha titanium alloy used in submarine hulls and spacecraft components - this exceptional piece delivers strength exceeding TC4 while maintaining remarkable 230g lightweight construction. The 15mm thickness and tactical stonewash finish create a collector's grade EDC tool that's as functional as it is extraordinary.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTC21 Aerospace Titanium:\u003c\/strong\u003e Near-alpha titanium alloy - superior strength, heat resistance, and corrosion immunity beyond standard TC4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSubmarine\/Spacecraft Grade:\u003c\/strong\u003e Same material used in deep-sea submersibles and aerospace applications requiring extreme reliability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty 15mm Thickness:\u003c\/strong\u003e Maximum structural profile provides exceptional palm support and impact resistance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTactical Stonewash Finish:\u003c\/strong\u003e Tumbled matte surface - non-reflective, scratch-resistant, superior grip texture\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eXXL Oversized Finger Holes:\u003c\/strong\u003e 23mm × 28mm openings accommodate the largest hands and heavy gloves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightweight 230g:\u003c\/strong\u003e 50% lighter than equivalent steel designs despite premium construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClassic Four-Finger Design:\u003c\/strong\u003e Traditional full-hand coverage for complete knuckle protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial: TC21 Titanium Alloy (Ti-6Al-2Sn-2Zr-3Mo-X)\u003c\/li\u003e\n\u003cli\u003eDimensions: 113mm × 65mm × 15mm (4.45\" × 2.56\" × 0.59\")\u003c\/li\u003e\n\u003cli\u003eFinger Holes: 23mm × 28mm each (oval, XXL oversized)\u003c\/li\u003e\n\u003cli\u003eThickness: 15mm (heavy-duty)\u003c\/li\u003e\n\u003cli\u003eWeight: 230g (8.1 oz)\u003c\/li\u003e\n\u003cli\u003eFinish: Stonewash (tumbled matte)\u003c\/li\u003e\n\u003cli\u003eConfiguration: Four finger, aerospace grade\u003c\/li\u003e\n\u003cli\u003eHardness: HRC 38-42 (TC21 alloy)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSizing Guide\u003c\/h3\u003e\n\u003cp\u003eThe XXL oversized 23mm × 28mm oval finger holes are the largest available in four-finger knuckle designs. Specifically engineered for users with very large hands or those requiring compatibility with heavy tactical gloves. The 15mm thickness distributes pressure evenly across the palm for comfortable grip despite substantial construction.\u003c\/p\u003e\n\n\u003ch3\u003eTC21 vs. TC4 Titanium\u003c\/h3\u003e\n\u003cp\u003eTC21 is a near-alpha titanium alloy that represents a significant upgrade over standard TC4 (Ti-6Al-4V):\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperior Strength:\u003c\/strong\u003e 10-15% higher tensile strength than TC4 at elevated temperatures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Heat Resistance:\u003c\/strong\u003e Maintains structural integrity up to 550°C vs. 400°C for TC4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Creep Resistance:\u003c\/strong\u003e Better performance under sustained stress - critical for aerospace applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExceptional Weldability:\u003c\/strong\u003e Near-alpha structure provides superior joining characteristics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep-Sea Rated:\u003c\/strong\u003e Used in submarine pressure hulls requiring extreme corrosion resistance and strength\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpacecraft Certified:\u003c\/strong\u003e Approved for aerospace applications demanding absolute reliability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAerospace \u0026amp; Marine Heritage\u003c\/h3\u003e\n\u003cp\u003eTC21 titanium alloy was specifically developed for the most demanding applications on Earth and beyond:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDeep-sea submarine pressure hulls operating at extreme depths\u003c\/li\u003e\n\u003cli\u003eSpacecraft structural components enduring temperature extremes\u003c\/li\u003e\n\u003cli\u003eHigh-performance jet engine components\u003c\/li\u003e\n\u003cli\u003eCritical aerospace fasteners and fittings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis heritage ensures your knuckle duster is constructed from material engineered to survive the harshest environments imaginable.\u003c\/p\u003e\n\n\u003ch3\u003eStonewash Finish Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNon-reflective tactical appearance eliminates glare\u003c\/li\u003e\n\u003cli\u003eMicro-textured surface provides superior grip in all conditions\u003c\/li\u003e\n\u003cli\u003eConceals daily wear and pocket scratches\u003c\/li\u003e\n\u003cli\u003eEnhanced corrosion resistance through increased oxide layer\u003c\/li\u003e\n\u003cli\u003eDevelops unique patina over time\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCollector's Grade Investment\u003c\/h3\u003e\n\u003cp\u003eThe combination of ultra-premium TC21 titanium, aerospace-grade engineering, and substantial 15mm construction makes this knuckle duster an exceptional collector's piece. TC21 is rarely used in EDC applications due to material cost - this represents a unique opportunity to own a functional tool crafted from submarine and spacecraft-grade titanium.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1× TC21 Titanium Four Finger Knuckle Duster (aerospace grade, stonewash finish)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ Legal Notice:\u003c\/strong\u003e Knuckle dusters are prohibited in many jurisdictions. Check federal, state, and local laws before purchase. This product is sold as a collectible item only. Buyer assumes all legal responsibility for possession and use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Carry ToolKit","offers":[{"title":"Default Title","offer_id":48104890630359,"sku":"carrytoolkit203","price":92.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/5781\/5767\/files\/brassknucklesweapons_1.jpg?v=1765595377","url":"https:\/\/carrytoolkit.com\/products\/tc21-titanium-four-finger-knuckle-duster-aerospace-grade","provider":"Carry ToolKit","version":"1.0","type":"link"}