drill bit Grinder Capacity:0.5-20MM; Drill bit Grinder AdvantagesIt is very easy for an operator, even an unskilled, to get point of operation ... wheel,etc. Takinhg into consideration of that a standard reground drill can improve working speed and quality, its economic benefit ... shape , which use as other tools to do specifications Drill Grinding diameter 0.8 - 26mmwheel diameter 125mm voltage 220v ...