The DEWALT 10 Piece Extreme Masonry Drill Set contains a variety of bits suitable for sds plus drills. The masonry drill bits are typically used for drilling anchor plastic plug fixing and pipework clearance holes. The 2-Stage helix offers improved drilling performance accelerating the removal of concrete mill from the tip reducing the working temperature and speeding up drilling. The Toughcore tapered central core increases stability and durability reducing breakage. The modular stackable small tough case has been designed for secure storage of accessories. The clear lid offers easy identification and easy bit removal and replacement. Use the locking system to connect the cases together and securely stack on top of the medium Toughcase. Compatible with the accessory caddy for TSTAK compatible connection.