{"product_id":"starrett-50042-12-inch-4-piece-combination-square-set","title":"Starrett 50042 12 Inch 4-piece Combination Square Set","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 50042 is a 4-piece combination square set built for precision layout and measurement work on job sites and in fabrication shops. The set includes a 12-inch hardened steel blade, a square head, a center head, and a protractor head, giving technicians and tradespeople a versatile tool for checking squareness, finding center, and measuring angles in a single kit. The blade is graduated in the 4R style, providing four graduation increments: 1\/64, 1\/32, 1\/16, and 1\/8 inch. Cast iron heads deliver the rigidity and stability required for repeatable, accurate readings across demanding trade applications.\u003c\/p\u003e\n\u003cp\u003eThis combination square set suits a wide range of trade and shop applications including HVAC fabrication, pipefitting layout, electrical enclosure work, and general metalwork. It is equally at home on a machine shop bench or a mechanical contractor's work table. The three interchangeable heads allow a single blade to serve multiple measurement functions without switching tools, making it a practical addition to any professional tool kit where layout accuracy is critical.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e12-inch hardened steel blade with 4R graduation (1\/64, 1\/32, 1\/16, and 1\/8 inch increments)\u003c\/li\u003e\n  \u003cli\u003eThree head types included: square head, center head, and protractor head\u003c\/li\u003e\n  \u003cli\u003eCast iron head construction for durability and dimensional stability\u003c\/li\u003e\n  \u003cli\u003eInterchangeable heads slide and lock on a single blade for versatile use\u003c\/li\u003e\n  \u003cli\u003e4-piece set ships as a complete kit — no additional heads required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose combination square set compatible with standard layout and measurement tasks across metalworking, fabrication, and mechanical trade applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCombination square sets require no installation but should be inspected for blade straightness and head lock tightness before use. When using the protractor head for angle layout, verify the locking nut is fully seated to prevent slippage during scribing. Keep the blade clean and lightly oiled to prevent corrosion and ensure smooth head movement. Store in a protective case or roll to avoid blade warping or graduation wear.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Pieces\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlade Length\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation Style\u003c\/strong\u003e: 4R\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation Increments\u003c\/strong\u003e: 1\/64 inch, 1\/32 inch, 1\/16 inch, 1\/8 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Types\u003c\/strong\u003e: Square, Center, Protractor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlade Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Material\u003c\/strong\u003e: Cast Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.188 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27111803\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 50042\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540494778674,"sku":"50042","price":354.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/abf3e1d8a0304a040b63e5739f54b7b6.jpg?v=1785856517","url":"https:\/\/voomisupply.com\/products\/starrett-50042-12-inch-4-piece-combination-square-set","provider":"Voomi Supply","version":"1.0","type":"link"}