Economic hot-sale hss materials diamond masonry drill bits

Description of hss materials diamond masonry drill bits:

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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We also could supply you other kinds masonry drill bits.

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hss materials diamond masonry drill bits