The Master Mechanic 691188 3/16" Carbide Tip Percussion Masonry Drill Bit is a high-quality tool suitable for drilling into various types of masonry materials. With a 4" length and a carbide tip, this drill bit offers durability and precise drilling results. Made of steel and designed for use with air drills, this black-colored bit is a reliable option for professional and DIY projects alike. Manufactured in China by Master Mechanic, this drill bit is a valuable addition to any toolbox.