New 100mm 4inch Diamond Coated Drill Bit Hole Glass Tile Ceramic Marble

Specifications:
Material: Diamond (plating)
Diameter: 100mm (4 inch)
Total height: 55mm(2.17 inch)
Shank diameter: 10mm(0.39 inch)

Features:
For glass, ceramics, marble and hard and brittle materials drilling.
Head made using diamond plating, tooth edges are sharp, than ordinary plated hole more durable.
Opening hole are neat and smooth, no broken edges, and no tremor phenomenon.
evacuation are more easily, improving the speed of opening.

Notice:
Drill Bit Hole was installed on an ordinary hand drill, due to this drill hole not have centering drill, must be careful when operating.
Please note when open the hole the speed can not too fast, must be slow.
In the process of opening hole must be add water to hole cooling , otherwise the hole will be burned.















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