{"product_id":"rob-cosmans-sharpening-rule","title":"Rob Cosman's Sharpening Rule","description":"\u003cp\u003eOur sharpening ruler includes a small \"hook\" on one end so that it catches on the sharpening stone to help the ruler not slide around. \u003c\/p\u003e\n\u003cp\u003eThe most innovative technique in plane sharpening over the last 35 years is the \"ruler trick\" by David Charlesworth. Traditionally, a sharp cutting edge is achieved by honing the back of your plane blade until it is dead flat (this takes hours), then you hone the primary bevel to achieve a razor sharp edge. \u003c\/p\u003e\n\u003cp\u003eDavid Charlesworth introduced his ruler trick to save significant time while still achieving a razor sharp edge.  Instead of flattening the whole blade back, he placed a thin ruler on the stone raising up the blade about 1 degree, effectively flattening the blades' leading edge, not the whole back.  David's \"ruler trick\" works great.\u003c\/p\u003e\n\u003cp\u003eWe custom make our sharpening ruler specifically for the \"ruler-trick\" \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e10-1\/2 inches (267mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth: \u003c\/strong\u003e\u003cstrong\u003e\u003c\/strong\u003e1\/2 inch (13mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003e.020 inches (.05mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHook:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSits down by .070 inch (1.5mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurface:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eNo ruler etchings so the blade freely slides back and forth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHanging Hole:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSmall hole at one end to hang the ruler.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"O'Connor Woodworking","offers":[{"title":"Default Title","offer_id":42273252474960,"sku":null,"price":12.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0265\/4643\/8224\/files\/IMG_0063_3_1080x810_1080x811_4e2fccab-2086-4b3e-a74e-dbd0198f8d91.jpg?v=1776133678","url":"https:\/\/ocwwvb.com\/products\/rob-cosmans-sharpening-rule","provider":"O'Connor Woodworking","version":"1.0","type":"link"}