5pcs Masonry Drill Bit 3mm Concrete Drill Bit Hex Shank 13/16x1-1/16x1/2" do not corrode or crack

do not corrode or crack easily and last for a long time even with zero maintenance

69 x 3/2 inch (OD x ID)

light weighted and durable

CDs and other objects

Material: S2

5pcs Masonry Drill Bit 3mm Concrete Drill Bit Hex Shank 13/16x1-1/16x1/2" do not corrode or crack1. Made of quality carbide YG6X, the rust resistant treatment and reinforced head prevent the drill from cracking and provide longer service life. 2. Four blade design, small incision resistance and small incision resistance. The U shaped groove drill design can effectively remove debris and improve your work efficiency. 3. 1 4 inch Hex Shank Masonry Drill Bit for most common drills, power drills, hand drills and bench drills, easy to install and