The Milwaukee 3-1/8" Carbide SDS-Plus Masonry Core Bit (Model 48-20-5235) is a high-quality drill bit made of steel with a 3-1/8 inch bit diameter. This durable bit is designed for commercial and heavy-duty use with air drills, air compressors, cement, and rotary tools. It is suitable for drilling into masonry materials and comes with a 1-year manufacturer warranty. The item dimensions are 18 inches in length, 3 inches in depth, and 3 inches in height, weighing 1 pound. Made in Germany, this Milwaukee core bit is a reliable tool for various drilling applications.