The DEWALT DW5447 Rock Carbide SDS Plus Masonry Hammer Drill Bit is a high-quality tool designed for drilling into concrete and other tough materials. With a 5/8" diameter and a length of 10" and 12", this bit provides plenty of reach and power for a variety of drilling applications. The carbide construction ensures durability and long-lasting performance, making it a reliable choice for professional and DIY projects alike. The SDS Plus design allows for easy bit changes and reliable connections to the drill or hammer, making it a convenient and efficient tool for any job.