{"product_id":"45mm-diamond-donut-bur-400-grit-5pcs","title":"45mm Donut Diamond Bur, 5pcs – 400 Grit Rotary Grinding Tool for Glass, Stone \u0026 Ceramic","description":"\u003cstyle\u003e\n\/* 超链接样式 *\/\na {\n  text-decoration: none;\n  color: inherit;\n  transition: all 0.3s ease;\n}\na:hover {\n  text-decoration: underline;\n}\n@media only screen and (max-width: 768px) {\n  body {\n    font-size: 16px;\n    line-height: 1.6;\n    padding: 0 10px;\n  }\n}\n\u003c\/style\u003e\n\u003cp\u003eThe \u003cstrong\u003e45mm Donut Diamond Bur, 5pcs\u003c\/strong\u003e is a precision rotary tool grinding bit engineered for smooth contouring, edge rounding, concave detailing, and fine surface finishing on glass, stone, ceramic, and gemstones. Featuring a rounded donut profile electroplated with fine 400 grit diamond coating on a rigid 6mm shank, this 5-piece set delivers exceptional control and uniform finishing without chatter.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter:\u003c\/strong\u003e 45mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Donut (Rounded Torus \/ Doughnut)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGrit:\u003c\/strong\u003e 400 Grit fine diamond coating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter:\u003c\/strong\u003e 6mm heavy-duty rotary shank\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 5-Pack (5 pieces)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBond Type:\u003c\/strong\u003e Electroplated diamond\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Edge rounding, smoothing, concave detailing, contour carving, and pre-polishing on jade, agate, quartz, glass, porcelain, marble, and granite\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUse with water lubrication or liquid coolant during grinding to prevent thermal buildup and maximize tool life.\u003c\/p\u003e","brand":"hanslapidarytool","offers":[{"title":"Default Title","offer_id":51046086049976,"sku":"BUR-DONUT-45MM-400G-5PK","price":42.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/3217\/9896\/files\/Diamond_Donut_Burs.png?v=1744421701","url":"https:\/\/lapidarygrinder.com\/pl-mx\/products\/45mm-diamond-donut-bur-400-grit-5pcs","provider":"hanslapidarytool","version":"1.0","type":"link"}