Hollow Core Bits / Cutters are designed for drilling large holes in various types of masonry and natural stone. With an asymmetrical carbide tooth design, Hollow Core Bits are designed for very smooth drilling. Additionally, they have an outer flute for more precise, accurate holes and the carbide teeth protrusion with chamfered edges prevent jamming. Finally, using the Hollow Core system is modular as sizes can be changed easily and all cores use the same SDS Plus adapters and centering drill bits.