{"product_id":"spi-13-258-9-combination-square-set-18-inches-2-piece","title":"Spi 13-258-9 Combination Square Set 18 Inches 2 Piece","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 13-258-9 is a 2-piece combination square set built for layout, marking, and inspection work in trade and industrial environments. The set centers on an 18-inch hardened steel blade graduated in both English and metric units, paired with a cast iron square head for stable, accurate reference. Graduation increments include 0.02 inch, 0.03 inch, 0.5 inch, and 1 mm, giving technicians the resolution needed for precise transfer measurements. Machinists, pipefitters, fabricators, and maintenance mechanics rely on this type of set for scribing lines, checking squareness, and measuring depth or height in the shop or field.\u003c\/p\u003e\n\u003cp\u003eThis combination square set is suited for general-purpose layout and inspection tasks across residential and commercial construction, mechanical fabrication, and equipment maintenance. The 18-inch blade length accommodates a wide range of workpiece sizes, and the English and metric dual-graduation format supports mixed-unit workflows common in industrial and trade settings. The cast iron square head provides consistent contact against flat and edge surfaces, making it practical for both bench and job-site use.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e18-inch hardened steel blade for durability and resistance to wear\u003c\/li\u003e\n  \u003cli\u003eDual English and metric graduation for versatile measurement applications\u003c\/li\u003e\n  \u003cli\u003eGraduation increments of 0.02 inch, 0.03 inch, 0.5 inch, and 1 mm\u003c\/li\u003e\n  \u003cli\u003eCast iron square head for stable, accurate squareness reference\u003c\/li\u003e\n  \u003cli\u003e2-piece set covers standard combination square layout tasks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose combination square set suitable for layout, scribing, and inspection tasks across machining, fabrication, plumbing, and mechanical trades.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCombination squares require no installation but should be handled carefully to maintain calibration accuracy. Inspect the blade and head interface for play or looseness before use, and keep the blade clean and free of burrs that could affect graduation readability. Store the set in a protective case or dry environment to prevent corrosion of the cast iron head and hardened steel blade.\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: 18 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: 4 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: SPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 13-258-9\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51714467201330,"sku":"13-258-9","price":103.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5901e110ecba1ecd7ce2402397939004.jpg?v=1788501873","url":"https:\/\/voomisupply.com\/products\/spi-13-258-9-combination-square-set-18-inches-2-piece","provider":"Voomi Supply","version":"1.0","type":"link"}