Milled Masonry Drill Bits PVC Sleeve Packed

1.surface finish:sand finnished, zine plated, chrome plated,nickce plated  and copper plated.

2.The masonry drills is machined from hign carbon steel with carbide tipped cutting edges.

*heat treatment

*shot blast finish for rust protection

*made of hign carbon steel with ind grade carbide tip for long life and efficient drilling

*milled slow spiral for quick,easydebris removal

*galvanized surface finish for corrosion resistance

*hardened core for extra strengh and reduced breakage

*for drilling in masonry concrete,rock and breeze blocks