{"product_id":"starrett-50111-double-square-blade-6-inch-4r","title":"Starrett 50111 Double Square Blade 6 Inch 4R","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 50111 is a hardened steel double square blade designed for precision layout and measurement work in mechanical, fabrication, and trade applications. The blade measures 6 inches in length and 1 inch in width, featuring 4R graduation with four scales: 1\/64 inch, 1\/32 inch, 1\/16 inch, and 1\/8 inch. This type of blade is used with a double square head to check 90-degree and 45-degree angles, scribe lines, and verify flatness on machined or fabricated surfaces. Machinists, pipefitters, ironworkers, and sheet metal workers rely on this tool for accurate layout work in the shop or field.\u003c\/p\u003e\u003cp\u003eThis blade is suited for use in metal fabrication shops, machine shops, HVAC sheet metal work, plumbing rough-in layout, and general trade applications where repeatable square and angle references are required. The 4R graduation style provides four measurement scales on a single blade, reducing the need to switch tools during layout tasks. It is appropriate for both bench work and field use wherever a compact, precision layout reference is needed.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e6 inch blade length for compact, close-tolerance layout work\u003c\/li\u003e\n\u003cli\u003e4R graduation includes 1\/64 in, 1\/32 in, 1\/16 in, and 1\/8 in scales\u003c\/li\u003e\n\u003cli\u003e1 inch blade width provides a stable reference edge\u003c\/li\u003e\n\u003cli\u003eHardened steel construction resists wear and maintains calibration under shop conditions\u003c\/li\u003e\n\u003cli\u003eCompatible with standard double square heads for 90-degree and 45-degree angle checking\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a replacement or additional blade for standard double square sets accepting a 6 inch hardened steel blade with 4R graduation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis blade is a hand tool component installed by the user into a compatible double square head — no power source or electrical shutoff is required. Ensure the blade locking mechanism on the head is fully disengaged before inserting or removing the blade. Inspect the blade edges for burrs before use, as burrs can affect measurement accuracy. Handle with care to avoid bending, which will compromise squareness readings.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlade Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlade Width\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraduation Style\u003c\/strong\u003e: 4R\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraduation Scales\u003c\/strong\u003e: 1\/64 in, 1\/32 in, 1\/16 in, 1\/8 in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Hardened Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.56 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: STARRETT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 50111\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542721495346,"sku":"50111","price":166.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6487d177b77e66608dba3b21aaeeac69.jpg?v=1785905344","url":"https:\/\/voomisupply.com\/products\/starrett-50111-double-square-blade-6-inch-4r","provider":"Voomi Supply","version":"1.0","type":"link"}