Diamond Tipped Drill Bit Set Twist Drill Bits 10pcs/SetSize: 0.8/1/1.2/1.5/2/2.5/3/3.5/4MMUse Range: jade, metal, Agate, Jade, gemstones, pearls, pendants, CobblestoneManufacturing material: This masonry drill bit is made of diamond material, with high hardness, stable structure and high durability.Supporting use: This masonry drill bit can be used with a drill bit, and the operation is simple.Colour:silverMaterial:EmeryPackage Contents:10 * Diamond Drill Bits SetOnly 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.