Masonry bits have a hardened, arrowhead shaped point for drilling into stone, brick, blockwork or concrete.
Masonry bits are commonly used with hammer action drills, which combine high speed rotation with vibration to break up the substrate. The fluted section of the drill is designed to remove the dust particles that are created by the drilling action.
SDS stands for slotted drive system, referring to the grooves on the shaft of the drill bit. These slots snap into the chuck of an SDS drill and locate the drill bit onto sprung ball bearings within the chuck, enabling the bit to move backwards and forwards smoothly when driven by the hammer action of the SDS drill.