{"product_id":"spi-13-253-0-12-inch-combination-square-set-2-piece-4r","title":"Spi 13-253-0 12 Inch Combination Square Set 2 Piece 4R","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 13-253-0 is a 2-piece combination square set built for layout, scribing, and inspection work across trade and fabrication applications. The set includes a 12-inch hardened steel blade and a cast iron square head, delivering the durability needed for regular jobsite or shop use. Graduations follow the 4R pattern, marked in 1\/64, 1\/32, 1\/16, and 1\/8 inch increments, allowing precise measurement and marking across a range of tolerances. The hardened steel blade resists wear and maintains accurate markings over extended use. The cast iron head provides stability and consistent 90-degree reference when squaring workpieces.\u003c\/p\u003e\n\u003cp\u003eThis combination square set is suited for machinists, pipefitters, millwrights, and sheet metal workers who need reliable layout and angle-checking tools on a daily basis. It performs well in both shop and field environments where consistent 90-degree and 45-degree reference angles are required. The 4R graduation style makes this set a practical choice for any trade professional working to standard fractional inch tolerances in metal fabrication, mechanical assembly, or general layout work.\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, 1\/8 inch increments)\u003c\/li\u003e\n  \u003cli\u003eCast iron square head for stable, accurate 90-degree reference\u003c\/li\u003e\n  \u003cli\u003e2-piece set suitable for layout, scribing, depth measurement, and inspection\u003c\/li\u003e\n  \u003cli\u003eHardened steel blade resists wear under repeated shop and field use\u003c\/li\u003e\n  \u003cli\u003e4R graduation style readable in standard fractional inch increments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 12-inch combination square set compatible with general layout and inspection applications in machining, fabrication, and mechanical trade work.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCombination squares require no installation but should be verified for square accuracy before use by checking against a known reference surface. Store the blade and head protected from impact to preserve graduation legibility and head seating accuracy. Periodically clean the blade channel and locking mechanism to maintain consistent blade positioning during use.\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: 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, 1\/32, 1\/16, 1\/8 inch\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\u003eHead Type\u003c\/strong\u003e: Square\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2 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: 13-253-0\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51695745696050,"sku":"13-253-0","price":78.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0d384cc6d461ba550aab556ff6127b41.jpg?v=1788337972","url":"https:\/\/voomisupply.com\/products\/spi-13-253-0-12-inch-combination-square-set-2-piece-4r","provider":"Voomi Supply","version":"1.0","type":"link"}