Wide Application：Aluminum oxide sanding bits are compatible with rotary tools, electric drills, die grinders, and polishing machines. Perfect for mold grinding, hole finishing, metal surface polishing, deburring, and DIY tasks like rust and burr removal. High Quality & Precision：Made from industrial-grade aluminum oxide for superior hardness, wear resistance, and cutting precision. Easily handles carbon steel, alloy steel, cast iron, hard bronze, and stainless steel with clean, polished results. Multiple Shapes & Sizes：This 64-piece sanding and grinding accessory set includes 14 pcs of 0.37 inch bullet-shaped bits, 14 pcs of 0.37 inch cylinder bits, 14 pcs of 0.59 inch cylinder bits, 20 pcs of dremel sanding drums (0.57inch and 0.31inch), and 2 drum mandrels — a complete set for all your grinding and sanding needs. Durable & Long-Lasting：These bits are tough enough for extended grinding use. The long 1/8" shank ensures a firm grip in the chuck or collet. Grinding heads can be cleaned and reshaped to extend service life and improve work efficiency. Universal Compatibility: Each accessory features a standard 1/8" (3mm) shank, making it compatible with most rotary tools that are compatible with Dremel, as well as with many electric and cordless drills. Easy to attach and designed to stay securely in place during high-speed grinding, sanding, and polishing. Warm Tip:For your safety, always wear appropriate protective gear such as a face shield or full-coverage safety goggles when using this product. If you have any questions or issues with the item, please feel free to contact our customer service team — we’re here to help and will respond within 24 hours. This 64-piece sanding bit set is compatible with Dremel rotary tools, offering a versatile solution for grinding, polishing, deburring, and rust removal. Made with durable aluminum oxide material, the set includes various shapes and sizes to handle a wide range of tasks on metal, wood, plastic, and more. Whether you're restoring old tools or fine-tuning your DIY projects, these sanding accessories provide reliable performance and a secure fit on most rotary tools compatible with Dremel. Perfect for hobbyists, craftsmen, and professionals alike.