{"product_id":"spi-13-261-3-24-in-2-piece-combination-square-set","title":"Spi 13-261-3 24 in 2-piece Combination Square Set","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 13-261-3 is a 2-piece combination square set built for layout, measurement, and inspection work in fabrication, machining, and general trade applications. The set includes a 24-inch hardened steel blade and a cast iron square head, offering the rigidity and durability needed for accurate, repeatable measurements on the shop floor or job site. Graduations are available in both English and metric scales, with increments as fine as 0.02 inches and 0.5 millimeters, making this set suitable for precision layout work across a range of material types and project requirements. Licensed machinists, pipefitters, and fabricators are the primary users of this tool.\u003c\/p\u003e\n\u003cp\u003eThis combination square set is designed for use in metalworking shops, fabrication facilities, and trade apprenticeship environments where both English and metric measurement are required. The 24-inch blade length accommodates larger workpieces that shorter 12-inch sets cannot span. The square head allows for 90-degree reference checks, depth measurements, and scribe line layout against a machined surface. The cast iron head provides a stable, wear-resistant reference surface that holds its ground against repeated use on hardened materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e24-inch hardened steel blade for rigidity and wear resistance during layout and scribing\u003c\/li\u003e\n  \u003cli\u003eCast iron square head for a stable, accurate 90-degree reference surface\u003c\/li\u003e\n  \u003cli\u003eDual English and metric graduation for flexible measurement across project standards\u003c\/li\u003e\n  \u003cli\u003eFine graduations at 0.02 inches and 0.5 mm support precision layout tasks\u003c\/li\u003e\n  \u003cli\u003e2-piece set provides complete square head and blade combination out of the box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard combination square set suitable for general metalworking, fabrication, and machining layout applications where a 24-inch blade length is required.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis tool requires no installation but should be inspected before use to confirm the blade locks securely in the head and the reference surfaces are free of burrs or debris. Store the set in a dry environment to prevent rust on the hardened steel blade. Do not use the tool as a striking instrument, as impact can affect calibration accuracy of the head and blade interface.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Pieces\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlade Length\u003c\/strong\u003e: 24 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation Style\u003c\/strong\u003e: English and Metric\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation Increments\u003c\/strong\u003e: 0.02 inches, 0.03 inches, 0.5 inches, 1 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Type\u003c\/strong\u003e: Square\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlade Material\u003c\/strong\u003e: Hardened 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: 5 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: SPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 13-261-3\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51692083249458,"sku":"13-261-3","price":77.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4c9e23b11ca8b0288921eae2949c8680.jpg?v=1788292863","url":"https:\/\/voomisupply.com\/products\/spi-13-261-3-24-in-2-piece-combination-square-set","provider":"Voomi Supply","version":"1.0","type":"link"}