... grinding wheel, long service life. 3, CE Universal Drill Grinder HL-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 ... : 2800r/minGrinding wheel diameter: 125×Φ20×32mmDimension:380×380×360mm Universal Drill Grinder