{"product_id":"starrett-56373-combination-square-set-18-in-3-pc","title":"Starrett 56373 Combination Square Set 18 in 3 Pc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 56373 is a 3-piece combination square set built for layout, inspection, and measurement work in the trades and light fabrication. The set includes an 18-inch steel blade graduated in 16R style, meaning the blade carries four graduation scales: 1\/32, 1\/64, 1\/100, and 1\/50 inch. Two heads are included: a standard square head and a center square head, both cast iron. This combination gives the technician or tradesperson a single kit capable of scribing 45- and 90-degree angles, finding the center of round stock, and verifying flat and square surfaces across a wide range of layout tasks.\u003c\/p\u003e\n\u003cp\u003eThis set is suited for use by HVAC sheet metal fabricators, pipefitters, electricians, and general maintenance technicians who perform layout and fit-up work on the job or at a shop bench. The 18-inch blade length accommodates wider stock and longer layout runs than a standard 12-inch set. The cast iron heads provide mass and stability during scribing. The 16R graduation style is a common shop standard, compatible with typical machinist and trade workflows where both fractional and decimal inch readings are required at the blade.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e18-inch steel blade with 16R graduation in 1\/32, 1\/64, 1\/100, and 1\/50 inch scales\u003c\/li\u003e\n  \u003cli\u003eCast iron square head for 90-degree and 45-degree layout and depth measurement\u003c\/li\u003e\n  \u003cli\u003eCast iron center square head for locating centers on cylindrical or round stock\u003c\/li\u003e\n  \u003cli\u003e3-piece set covers standard squaring, angle, and center-finding tasks in one kit\u003c\/li\u003e\n  \u003cli\u003eSteel blade construction resists flex during extended layout use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 18-inch combination square set suitable for general trade layout and inspection work where 16R-graduated blades and cast iron heads are required.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCombination squares are hand-layout tools and require no installation in the traditional sense. Secure the head firmly on the blade before use to prevent slippage during scribing. Keep the blade and head contact surfaces clean and free of burrs or debris to maintain accurate 90-degree registration. Store the set protected from impact to preserve blade graduation legibility and head squareness over time.\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: 18 inches\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\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\u003eHead Types Included\u003c\/strong\u003e: Square Head, Center Square Head\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.88 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: 56373\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51539253297458,"sku":"56373","price":308.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5758f4baaa301ae4d37491ba33e8b28c.jpg?v=1785837177","url":"https:\/\/voomisupply.com\/products\/starrett-56373-combination-square-set-18-in-3-pc","provider":"Voomi Supply","version":"1.0","type":"link"}