Material: Steel Blade size: Size 1: 16mm/18mm/20mm Size 2: 17mm/19mm/21mm Size 3: 19mm/20mm/21mm Size 4: 20mm/21mm/22mm Color: as shown Package List 1*knife handle 1*wrench 3*blade 3*drill 2*screw 11. Brilliant Wood Processing can produce beautiful wooden necklace beads, pendants, bracelets and rings; 2 2. The ring design tool will help you make several rings with the same thickness and the same standard size; 3 3. A finely processed and polished wooden ring can be an excellent tableware or jewelry, very suitable for napkin rings and jewelry, and can be easily installed and removed to any handheld device or machine; 4 4. Made of high-quality steel material, durable. The wooden ring drill bit can quickly and easily grind the wooden ring smooth, and provide you with good results to achieve the smoothness you want; 5 5. With the help of wood bead drill bits, you can design or DIY your own jewelry, handicrafts, home decoration and more crafts, use your imagination, create beautiful projects, and exercise your handcraft skills.