HSS micro drill bits,mini drill bits. Made of high speed steel. For watch repair and jewelry production. Size:0.2mm-1mm. HSS micro drill bits,mini drill bits.High speed steel,material M2,W9Straight shank,Din338,Fully ground.Size:0.2mm-1mm.Sizes can be made according to customer's need.Used for watch repair and jewelry production. Micro drill bits,mini drill bit, high speed steel