Features: Convenient to install: These 6 mm drill bits are easy to install, you just attach them to compatible drills for creating holes, so that you can cut or perforate through the hard surfaces via rotation. Versatile uses: With fine workmanship and careful polished, the carbide tip drill bit set can be coordinated with most drills to apply for house, classroom, office, bathroom, bedroom and the other places you like. Specifications: Material: cemented carbide Color: orange Size: The spear-pointed tip: 6 mm/ 0.24 inches The bottom: 0.48 mm/ 0.02 inch in diameter Total length: 70 mm/ 2.76 inches Package includes: 20 x Masonry drill bits Notes: Manual measurement, please allow slight errors on size. The color may exist slight differences due to different screens.