?【12-PCS CONCRETE DRILL BIT SET】Cement drill with premium YG6X tungsten steel canneasily beused for glass, ceramic, tile, mirror, plant pots, wood, marble, thin iron plate, plastic, paver on concrete or brick wall pavers, etc.,?【12-PCS MASONRY DRILL BIT SET】Consistss of 7 different sizes :1/8", 5/32", 3/16", 3/16", 1/4", 1/4", 1/4", 1/4", 5/16", 5/16", 3/8", 1/2", that will help in drilling by starting with smallest bit and continuing to size needed.,?【CARBIDE CROSS DRILL BIT】Profession Industrial strength cross head bits designed to provide maximum cutting power and accuracy, sharp durability. Cool with water and control speed while drilling.,?【HEXAGONAL SHANK】1/4 "hexagonal handle can reduce slip when drilling into hard surface, safer to use. It is suitable for normal power drills, hand drills, and bench drills.,?【INSTRUCTIONS FOR USE】 For drilling harder materials like ceramic tile, marble, glass, and granite that require water, gradually apply increasing pressure while maintaining an inclined-to-perpendicular drilling angle.