1.Drill grinder, efficiency, durable, universal 2.Twist drill, throng drill, thin wall drill, anomalous drill, and so on. 3.CE universal drill grinder Mr-25A1. It is used to grind twist drill, throng drill, thin wall drill, anomalous drill, Nizhifu drill, etc.2. It has accurate, effective, reliable, long lasting and low-cost features.3. It can be used for grinding other cutters or crafts by ...