Profile: Dennis Tool Co. manufactures inorganic chemicals, machine tools & accessories. We also produce oil & gas field machinery. Our products include PDC cutters for oilfield drill bits, PDC bearings for downhole drilling motors & production pumps, PCD tool blanks for automotive, aerospace & woodworking applications and PCBN tool blanks for ferrous machining. Our materials development includes microwave sintered carbide, carbide/diamond composites and related production equipment.