The Milwaukee 48-20-7499 SDS-Plus 4Ct MX4 Kit includes six high-performance drill bits designed for robust masonry and concrete drilling. This set is ideal for professionals or DIY enthusiasts who require precision and durability on construction or renovation projects. The SDS-Plus shank ensures a secure grip in compatible rotary hammers, reducing slippage. The MX4 carbide tip construction provides long-lasting performance and extended bit lifespan.