{"product_id":"spi-13-971-7-combination-square-set-4-inch-stainless","title":"Spi 13-971-7 Combination Square Set 4 Inch Stainless","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 13-971-7 is a 4-inch combination square set designed for layout, measurement, and angle verification tasks in trade and shop environments. The set includes a stainless steel blade with both English and metric graduations, reading to 1\/32 and 1\/64 inch, alongside three interchangeable heads: a square head, a center head, and a protractor head. This versatility makes it a compact, multi-function precision tool used by pipefitters, electricians, machinists, and general tradespeople who need accurate scribing and angle measurement in tight spaces. The blade measures 4 inches in length and 3\/4 inch in width.\u003c\/p\u003e\n\u003cp\u003eThis combination square set suits layout work across residential and commercial trade applications. The square head handles 45-degree and 90-degree angle checks, the center head locates the center of round stock, and the protractor head reads angles for custom cuts and fit-up work. It is well suited for conduit layout, pipe fitting, carpentry trim work, metal fabrication, and any application where repeatable, precise measurements are needed in a compact format.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-inch stainless steel blade with 3\/4-inch width for compact layout work\u003c\/li\u003e\n  \u003cli\u003eEnglish and metric dual graduation to 1\/32 and 1\/64 inch resolution\u003c\/li\u003e\n  \u003cli\u003eThree-head set: square head, center head, and protractor head included\u003c\/li\u003e\n  \u003cli\u003eStainless steel blade and head construction for corrosion resistance and durability\u003c\/li\u003e\n  \u003cli\u003eInterchangeable heads for versatile use across multiple measurement tasks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 4-inch combination square set suitable for general trade layout and measurement applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eNo installation is required for hand tools of this type. Before use, verify that the blade locks securely in the head and that the reference edge is clean and free of burrs. Store in a dry location to maintain blade and head accuracy over time. Periodic inspection of the locking mechanism ensures consistent measurement results.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlade Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlade Width\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBlade Material\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Material\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Types Included\u003c\/strong\u003e: Square, Center, Protractor\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: 1\/32 inch and 1\/64 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 13-971-7\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51700364607794,"sku":"13-971-7","price":20.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/653eea7aaa5a3bff8dbeab2126752352.jpg?v=1788389412","url":"https:\/\/voomisupply.com\/products\/spi-13-971-7-combination-square-set-4-inch-stainless","provider":"Voomi Supply","version":"1.0","type":"link"}