[Details] Including 5 different shapes: 1.5 mm cone, 3.0 mm cone, 1 mm cylinder, 2 mm cylindrical and 3mm cylindrical [Size] Handle diameter: 3mm (1/8 inches), grinding length: 30mm, total length: 70mm [Application] Suitable for drilling, expanding stones, glass, ceramics, jewelry, etc. [Reminder] In order to use it for a long time, please use the lubricant when using all diamond coating tools Colour:Silver Material:Metal Package Contents: 1set x diamond drill bits Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.