• Set of 5 professional 8 mm drill bits made of robust tungsten carbide. • Versatility for drilling tiles, concrete, brick, marble, glass, plastic, wood, cast iron, and soft metals. • Tungsten carbide tip that ensures fast penetration and maintains sharpness for longer. • Innovative double-flute design that facilitates waste evacuation and prevents overheating. • 1/4 inch hex shank compatible with most manual and bench drills.