Milwaukee 48-20-3582 - 13 in. SDS+ Core Bit AdapterMilwaukee SDS Plus masonry core bits are ideal for drilling large holes in brick, block, and concrete with SDS Plus rotary hammers. Asymmetrical Carbide teeth break up material more effectively resulting in up to 20% faster drilling speeds. Centering bits allow for easy alignment of the hole and precise spot drilling. The versatile two piece design allows users to drill with several different core bit sizes using one adapter. The spiral core body