Durable Best-Selling masonry drill bit for marble

Description of masonry drill bit for marble:

High Quality Carbide Tip 
Long Drilling Life 
Professional Welded 
Heat Treatment Rod Hardness HRC40 to 45 
Good Service 

Chrome Plated Black&White Masonry Drill Bits for Contrete / Granite / Brick / Marble

YG8 Carbide Tip 45# Carbon Steel

Profesional Heat Treatment

Longer Drilling Life

                                    Introudction

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masonry drill bit for marble