The P5 DC dry diamond cores are suitable for all popular building materials such as, standard house bricks, concrete blocks, breeze blocks, hand made bricks, building blocks AND harder bricks such as class A engineering & clay bricks. The P5 DC dry cores can also be used more effectively on 2kg SDS machines and are available as standard 150mm long barrel or 400mm extra long barrel. Set Comprises: 42mm, 52mm, 65mm, 117mm & 127mm dry diamond cores + chuck, SDS adaptors, extensions, guide rod, drift key & pilot drill.