Various Design: The stone carving tool has 20 pieces in total, and designed in various shapes, such as sphere, cone, cylinder, round head cylinder. Different shapes can meet your different requirements when crafting, will greatly improve work efficiency. Size and Quantity: The needle is 44.5-46mmx2mm, 1-3.5mm in diameter. Pin is 1-3.5mm. Can work with most rotary tools or die grinders, bring no limitation to your craft. With a 5.7x9.8x1cm plastic box, very convenient for daily use and storage. High Quality Material: The stone carving tool is made of diamond with reliable quality, thick and durable, hard, abrasion-resistant and can be used and bring your crafts work convenience for a long time. A good choice for craftspeople. Multiple Function: The good quality and size make the stone carving tool can be used for sculpturing, dressing, precision grinding and internal grinding carbide in ceramic, glass, precious stone, alloy and many other abrasive materials. Also ideal for home improvement, like old furniture polishing. Nice Gifts: Ideal for jewelers, lapidary, friends and family who has DIY engraving hobbies or who needs stone carving, craft modeling, home repair, polishing, grinding, cutting, engraving, carving. Very thoughtful gifts that show your care and love.