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 & pipework clearance holes. The 2-Stage helix offers enhanced drilling performance accelerating the removal of concrete mill from the tip reducing the working temperature & speeding up drilling. The Toughcore tapered central core increases stability & durability reducing breakage. The modular stackable small tough case has been designed for secure storage of accessories. The clear lid offers easy identification & easy bit removal & replacement. Use the locking system to connect the cases together & securely stack on top of the medium Toughcase. Compatible with the accessory caddy for TSTAK compatible connection.