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Premium Sandblasted Masonry Drill Bits for Hard Materials. Sandblasted Finish: Provides excellent anti-rust properties for durability. Industrial Grade Carbide Tip: Crafted from high carbon steel for superior hardness. Milled Slow Spiral Design: Ensures quick and easy debris removal during drilling. Versatile Material Compatibility: Ideal for drilling into rock, stone, marble, and granite. Rotary and Percussion Compatible: Specifically designed for use with both drill types. Wide Size Range: Available in diameters from 1/8 inch to 1 inch. Reduced Shank Recommendation: Recommended for sizes 11mm or 7/16 inch and above. Complete Drill Sets Available: A range of sets offered to suit various professional needs.