Features 1、Diamond abrasive bonding surface is plated for strength and long life. 2、Suitable for shaping and drilling tile, glass, stained glass, stone and other hard material. 3、The use of industrial grade allloy material that ensures robustness and long lasting performance. 4、These grinding burrs may fit into different types of rotary tools 5、Diamond burrs are versatile and can be used for various applications such as grinding, engraving, carving, and more. Specification Item Type: Diamond Burr Bits Material: Alloy Size: 1/4 Inch Note: 1. Manual measuring, please allow 1 ~ 3mm error,thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package List 1 x Grinder Head