{"product_id":"marshalltown-16504-cast-aluminum-line-stretchers","title":"Marshalltown 16504 Cast Aluminum Line Stretchers","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe MARSHALLTOWN 16504 is a pair of cast aluminum line stretchers designed to hold and tension mason lines between key course blocks during masonry layout work. The stretchers are fully adjustable from 4 inches to 12 inches, allowing a single tool to accommodate varying block widths and wall thicknesses without swapping out hardware. The cast aluminum construction keeps weight low while maintaining the rigidity needed to hold a taut line under field conditions. Masons and masonry contractors use these to establish straight, level course lines across block or brick work, making them a standard layout tool on residential and commercial masonry jobs.\u003c\/p\u003e\u003cp\u003eThese line stretchers are suited for use on concrete masonry unit (CMU) block walls, brick courses, and similar masonry applications where consistent line tension is critical to maintaining level courses. The adjustable range of 4 to 12 inches makes them practical for standard block widths commonly encountered in residential foundations, retaining walls, and commercial block construction. They are sold as a pair, which is the standard configuration for spanning a wall section between two corner or key blocks.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFully adjustable from 4 inches to 12 inches to fit varying block widths\u003c\/li\u003e\n\u003cli\u003eCast aluminum construction for lightweight durability\u003c\/li\u003e\n\u003cli\u003eSold as a pair for immediate use on a wall section\u003c\/li\u003e\n\u003cli\u003eHolds mason lines taut between key course blocks for accurate layout\u003c\/li\u003e\n\u003cli\u003ePackaged in a poly bag with header card for jobsite storage and retail display\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard replacement or additional pair of line stretchers for use with mason line on CMU block and brick masonry courses requiring adjustable line tensioning between key blocks.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eLine stretchers are installed by masonry tradespeople as part of wall layout and course alignment. No power tools or fasteners are required. Position each stretcher securely on the key course block before tensioning the mason line to prevent slippage. Inspect the stretchers for wear or deformation before each use to ensure consistent line tension throughout the course.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustment Range\u003c\/strong\u003e: 4 to 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cast Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity\u003c\/strong\u003e: Pair (2 pieces)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 4.38 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: Each\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 6\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MARSHALLTOWN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 16504\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MARSHALLTOWN","offers":[{"title":"Default Title","offer_id":51525353668914,"sku":"16504","price":101.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f4ad68c5ab181b141eb826f4cdd97321.jpg?v=1785471382","url":"https:\/\/voomisupply.com\/products\/marshalltown-16504-cast-aluminum-line-stretchers","provider":"Voomi Supply","version":"1.0","type":"link"}