{"product_id":"starrett-56399-12-inch-combination-square-set-3-piece","title":"Starrett 56399 12 Inch Combination Square Set 3 Piece","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 56399 is a 3-piece combination square set built for layout, inspection, and measurement work across a range of trade and fabrication applications. The set includes a 12-inch steel blade, a square head, and a center head, all machined to work together for accurate angular and linear measurement. The blade is graduated in 16R style, providing four graduation scales: 1\/100, 1\/32, 1\/50, and 1\/64 inch. The center head is forged steel for durability under regular shop use. This set is appropriate for machinists, pipefitters, millwrights, and other trade professionals who require reliable layout tools.\u003c\/p\u003e\n\u003cp\u003eThis combination square set is suited for both shop and field use where precise layout, 90-degree and 45-degree angle verification, and center-finding are required. The 12-inch blade length accommodates a broad range of workpiece sizes. The forged steel center head provides accurate bisecting of round stock or flat material. The square head allows checking of right angles and depth measurements. The 16R graduation style makes this set compatible with standard machinist and trade measurement workflows where multiple fractional and decimal scales are needed on a single blade.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e3-piece set includes a 12-inch steel blade, square head, and forged steel center head\u003c\/li\u003e\n  \u003cli\u003e16R graduation style with 1\/32, 1\/64, 1\/100, and 1\/50 inch scales on a single blade\u003c\/li\u003e\n  \u003cli\u003eForged steel center head for strength and dimensional accuracy under repeated use\u003c\/li\u003e\n  \u003cli\u003eSteel blade construction for rigidity and resistance to wear\u003c\/li\u003e\n  \u003cli\u003eSquare head enables 90-degree and 45-degree angle measurement and depth gauging\u003c\/li\u003e\n  \u003cli\u003eCenter head allows accurate center-finding on round and flat stock\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard-format combination square set for professional layout and inspection tasks in machining, pipefitting, millwright, and general fabrication trades.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCombination square sets are hand tools that require no installation. Before use, verify that all head locking mechanisms are tight and that the blade seats fully in the head. Keep the blade and head surfaces clean and free of burrs to maintain measurement accuracy. Store in a protective case or tool roll to prevent damage to graduated surfaces.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Pieces\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlade Length\u003c\/strong\u003e: 12 inches\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: Forged Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Types\u003c\/strong\u003e: Square, Center\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation Style\u003c\/strong\u003e: 16R\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation Scales\u003c\/strong\u003e: 1\/32, 1\/64, 1\/100, 1\/50 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.438 pounds\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: 56399\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541652439346,"sku":"56399","price":326.83,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f87fe81f0b859464ebf393cd55845f3f.jpg?v=1785881246","url":"https:\/\/voomisupply.com\/products\/starrett-56399-12-inch-combination-square-set-3-piece","provider":"Voomi Supply","version":"1.0","type":"link"}