The Xpresscut Drill Core Bits are available in two core bit lengths, 150mm and 300mm, and come in a range of diameters from 22mm to 152mm. The 22mm and 28mm are ideal core bits for enlarging condensate or gas pipes, while the 127mm and 152mm core drill bits are designed for boiler flues or soil pipe fittings. The Clipacore Xpresscut core bit barrels were developed in the UK. They are spiralled and slotted to facilitate quick dust removal and to protect the diamond tips from overheating. These bits are suitable for most building materials found in the UK. Like all core bits, the Clipacore Xpresscut core bit barrels are compatible with our Clipacore Quick Release System.