Diamond Burrs are ideal for hobby and precision work, Diamond cylinder dremel bits are a high-speed cutter made of steel tipped with diamond particles. Ideal for fine detail work on wood, jade, ceramic, glass, hardened steel and other hard materials. Removes material quickly and easily. For curved surfaces. Made from galvanically bonded diamond impregnated steel. Ideal for carving hard or soft materials such as glass, stones, bone, ivory, ceramics, and all metals. All items will be shipped from China by China post within 48 business hours upon receipt of payment (except Saturday and Sunday).It takes about 7-14 days to ship to United States, Australia, United Kingdom, Canada, France, Europe, Asia or other places worldwide. We are unable to take any responsibility for any custom delay or tax. Reason is because transit time is highly depended and provided by Postal Service (except weekends and holidays).US customer trace it on US Post office website and others countries please trace it on Chinese Post office website.