The ARMEG 11 Piece Dry Diamond Core Drill Bit Set is a versatile and efficient tool designed for drilling in brick, block, and masonry materials. Featuring high-quality diamond drill bits in sizes ranging from 42mm to 127mm, this set includes a range of bits to suit different drilling needs. The included case makes storage and transportation convenient, while the 1/2 BSP shank type ensures compatibility with a variety of drilling machines. Ideal for professionals in woodworking, metalworking, and manufacturing, this diamond drill bit set from ARMEG is a reliable and durable addition to any toolkit.