Diablo, 4" diamond segmented cut-off discs for masonry. Diablo's diamond segmented masonry cut-off discs provide extreme durability and longer life in concrete, concrete with rebar, brick and cinder block. These diamond rimmed discs deliver up to 2 times longer cutting life versus standard diamond cut-off discs. The disc's industrial-grade diamonds with hardened disc body delivers lasting durability and maximizes cutting quality in hardened materials even in extreme applications.