1. Multiple Shapes: Needle tips for engraving, disc blades for cutting glass, cone grinders for pet nails, tree shapes for woodcarving...Easy to deal with metal tile ceramic glass jade marble granite and other hard materials, full coverage from professional DIY to daily 2. 100-Slot Organizer: Every grinding head gets its own spot, you can store more bits and never lose a burr again, keep your workspace instantly tidy. It’s like a portable workstation—just grab it and take your tools anywhere 3. Materials : Diamond particles, uniform grit, thick and durable, more wear-resistant than ordinary sanding bits (Tip: Applying water-cooling during the grinding of glass, ceramic, or stone enhances surface finish quality and significantly prolongs tool service life) 4. Universal Compatiblity : 3mm Shank(1/8") fits most rotary tools (Dremel, drills, die grinders, etc.) Plug-and-play in seconds – no adapters needed! Perfect for DIY crafts, home repairs, or professional workshops 5. Specification: Diamond grinding bit *52pcs, the blue support stand *1. if any issues with quality, leave us a message and we will provide a 100% satisfactory solution soon. More thanks! Multi-functional -- Diamond grinding burr bits, suitable for polishing stone, glass, ceramics, tile, brick,fiberglass, rock. DIY craft, craft modeling, home repair (wood, some plastic and dogs’ nails) etc.