Profile: Clutchco International Inc. specializes in oilfield clutches and brakes for the drilling and well servicing sectors. Large PO air clutches are available in 356, 457, 610, 762, 914 and 1067 mm diameter sizes with single, double, or triple-plate construction available in most sizes. Water cooled element sizes are indicated by the number of friction discs, and the disc diameter in inches. Our WCS line water cooled brake is designed specifically for continuous slip service, to absorb and dissipate thermal loads associated with the most severe clutch and brake applications.