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Cone Shank Diamond Drill Bit Advantages: Grinding Sharp Excretion Easy, Good Self-Sharpening. Smooth Hole Without Cutting Edge Without Vibration. High Wear Resistance. Long Life. The Efficiency Of Several Times The Characteristics Of Electroplating Drill Bit. Cone Shank Diamond Drill Bit CONE SHANK DIAMOND DRILL BIT OF APPLICATION: Cone Shank Diamond Drill Bit is commonly used for drilling ordinary glass(bathroom glass, kitchen glass, furniture glass, home appliances, glass, etc.) Such as: glass doors and windows, indoor large partition, glass table, wardrobe glass and other glass holes in the diameter of 5-100mm. CONE SHANK DIAMOND DRILL BIT FOR APPLICABLE MACHINE: Semi-automatic glass drilling machine,manual glass drilling machine,etc. Straight Shank Diamond Drill Bit can be adapted to vall types of manual and semi-automatic drilling machines.(the speed is 100 (rpm), 2500 (rpm), the maximum speed can reach 4500 (rpm), et