This lot includes 10 pcs DeWalt DW5477 7/8" x 8" x 10" Rock Carbide 4 Cutter SDS Bits. These bits are ideal for use on concrete, brick, and masonry. They have a four-cutter design that reduces vibration and increases drilling speed. The bits are made of high-quality rock carbide for durability and long-lasting use. They are compatible with SDS+ rotary hammers and are perfect for both professional and DIY use. Add this lot of DeWalt drill bits to your toolkit today!