Drill Grinder is easy to operate, no experience required for grind a precision drill. Set up the drill to the collet holder. Follow up the steps for set up the drill to the collet holder. Set up the diameter of drill. Turn right the scale to meet the diameter of the drill. Set up the drill the grinding position. Grind the drill tip. Turn on the power of the grinder. Insert the collet holder with drll and reach go to the grinding wheel slowly, then move left and right repeatedly. Center point grinding base adjusting Grind the center point of drill.