The small-diameter carbide drill developed by OSG has a total size of more than 200 sizes from φ0.2mm to φ5.0mm, and the outer diameter tolerance is 0-0.010mm. Features of GDS bit: 1 mainly processing holes below 3D, the groove length is short; 2 tool base material is ultra-fine grain cemented carbide, good resistance to damage; 3 bit is treated by TiCN coating, wear resistance and anti-collapse Excellent blade edge and prolonged tool life; 4Using a new type of spiral groove, the chip discharge is smooth, which can restrain the chip blockage and winding failure; 5 When the drill diameter is above φ2mm, the cutting edge is chamfered and has good cutting Performance and high tip strength for improved hole machining accuracy.