{"product_id":"glass-engraving-set","title":"Proxxon Glass Engraving Set — 4-Piece, Diamond \u0026 Silicon Carbide Bits, 2.35mm Shank (No. 28920)","description":"\u003cp\u003eFour specialist bits for glass, ceramic, and hard surface engraving. The Proxxon 4-piece glass engraving set combines diamond grinding bits for fine detail work with silicon carbide mounted points for texturing and frosting — covering the full range of engraving, scribing, and surface finishing techniques on glass, ceramic, stone, and hard plastics. All four bits share the standard 2.35mm (3\/32\") shank for compatibility with Micromot rotary tools.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiamond grinding bit, round Ø 1\/32\" (1.0mm):\u003c\/strong\u003e Ultra-fine point for detailed line work, lettering, and intricate engraving on glass and ceramic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiamond grinding bit, round Ø 5\/64\" (1.8mm):\u003c\/strong\u003e Slightly larger round tip for broader strokes, shading, and faster material removal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilicon carbide mounted point, flat-end taper Ø 3\/32\" × 9\/32\" (2.5 × 7mm):\u003c\/strong\u003e For frosting, texturing flat areas, and scribing on glass and stone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilicon carbide mounted point, flame Ø 3\/32\" × 13\/64\" (2.5 × 5mm):\u003c\/strong\u003e Flame profile for contouring, curved surface texturing, and detail frosting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePieces:\u003c\/strong\u003e 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank:\u003c\/strong\u003e 3\/32\" (2.35mm) — standard Micromot collet size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAbrasives:\u003c\/strong\u003e Diamond (bits) and silicon carbide (mounted points)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Engraving, scribing, finishing textures, frosting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart No.:\u003c\/strong\u003e 28920\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible Materials\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlass:\u003c\/strong\u003e Glassware, mirrors, windows, decorative glass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCeramic and stone:\u003c\/strong\u003e Tiles, stoneware, granite, marble\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHard plastics:\u003c\/strong\u003e Acrylic, polycarbonate\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the difference between the diamond bits and the silicon carbide points?\u003c\/strong\u003e\u003cbr\u003eThe diamond bits are for precise, fine-line engraving and detail work — they cut cleanly and hold their shape. The silicon carbide mounted points are better for broader surface work like frosting, texturing, and scribing where you want a more diffuse abrasive action.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich Proxxon tools are these compatible with?\u003c\/strong\u003e\u003cbr\u003eThese bits fit any Micromot-compatible tool with a 2.35mm collet, including the \u003ca href=\"\/products\/engraver-gg-12\"\u003eGG 12 High-Speed Engraver\u003c\/a\u003e, the \u003ca href=\"\/products\/professional-rotary-tool-ibs-e\"\u003eIBS\/E\u003c\/a\u003e, and the \u003ca href=\"\/products\/proxxon-cordless-professional-drill-grinder-ibs-a-tool-only\"\u003eIBS\/A\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use these on metal?\u003c\/strong\u003e\u003cbr\u003eDiamond bits can be used on hardened steel and non-ferrous metals for scribing and marking, though they are optimized for glass, ceramic, and stone. For general metal engraving, the \u003ca href=\"\/products\/engraving-device-ge-20\"\u003eGE 20 Engraving Device\u003c\/a\u003e is a better choice.\u003c\/p\u003e\n\n\u003ch2\u003eWorks Well With\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/engraver-gg-12\"\u003eProxxon High-Speed Engraver GG 12 (No. 28592)\u003c\/a\u003e — the ideal host tool for glass engraving with these bits\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/proxxon-complete-glass-engraving-set-gg-12-with-transformer-bits-no-38635\"\u003eProxxon Complete Glass Engraving Set — GG 12 with Transformer \u0026amp; Bits (No. 38635)\u003c\/a\u003e — full kit including the GG 12, transformer, and bit set\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/professional-rotary-tool-ibs-e\"\u003eProxxon Professional Rotary Tool IBS\/E\u003c\/a\u003e — compatible corded Micromot host tool\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/engraving-device-ge-20\"\u003eProxxon Engraving Device GE 20 (No. 27106)\u003c\/a\u003e — pantograph engraver for guided letter and number engraving\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eReturns can only be accepted for unused product in its original packaging. A copy of the original packing slip or invoice is required. For warranty claims please call 1-877-776-9966. Please see our return and refund policy \u003ca href=\"\/pages\/refund-policy\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ehere\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cspan class=\"js-reveal\" data-reveal-target=\".js-reveal-container\"\u003eCalifornia Residents Prop 65 Information\u003c\/span\u003e\n\u003cdiv class=\"js-reveal-container\" data-reveal-mode=\"slide\"\u003e\n\u003cbr\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1643\/2529\/files\/exclamation-mark-24144_large.png?v=1511288737\" alt=\"\" width=\"16\" height=\"14\" border=\"0\" align=\"left\" style=\"margin: 6px 6px 0 0;\"\u003eWARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to \u003ca href=\"https:\/\/www.p65warnings.ca.gov\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e.\u003c\/div\u003e","brand":"Proxxon","offers":[{"title":"Default Title","offer_id":51229978951904,"sku":"28920","price":9.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0786\/3943\/1904\/files\/28920_ae533cd9-c35d-4f42-a9e0-77c764453fc6.jpg?v=1774616119","url":"https:\/\/protoolhaus.com\/products\/glass-engraving-set","provider":"Pro Tool Haus","version":"1.0","type":"link"}