{"product_id":"alvin-rolling-parallel-ruler","title":"Rolling Parallel Ruler","description":"\u003cp\u003eNylon rollers mounted on the blade let this ruler track perfectly parallel across your drawing surface without the drift or wobble that derails precise technical work. Roll it up or down your page, and each line maintains exact spacing, essential for architectural elevations, perspective grids, or any layout requiring consistent intervals. High-impact plastic construction provides the rigidity needed for clean edges while remaining light enough for comfortable repositioning through long drafting sessions.\u003c\/p\u003e\n\u003cp\u003eGraduated scales in both inches and metric units eliminate constant conversion calculations, while printed formulas and conversion factors keep essential reference data within sight. The clear plastic body lets you see underlying work as you position each line, particularly useful when aligning with existing elements or maintaining registration across complex drawings. Black satin edges provide contrast against white paper for accurate placement.\u003c\/p\u003e\n\u003cp\u003eBeyond parallel lines, the ruler handles circles, curves, and arcs, the rigid construction doubles as a reliable straightedge for general measuring and cutting guides. Technical illustrators, architecture students, and designers working in traditional media find this combination of parallel-line precision and multipurpose functionality handles the range of tasks that emerge during detailed drafting work.\u003c\/p\u003e","brand":"Alvin","offers":[{"title":"6 in.","offer_id":47980098093285,"sku":"25988","price":9.78,"currency_code":"USD","in_stock":true},{"title":"12 in.","offer_id":47980098126053,"sku":"94977","price":12.81,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.texasart.mom\/products\/alvin-rolling-parallel-ruler","provider":"Texas Art Supply","version":"1.0","type":"link"}