Double Pulley Centrifugal Clutch Sawmills 25hp - 40hp with 1 1/8 bore w/ 1/4” key way. Pulleys are 5” and the Clutch Drum is 8”. These are new, they’ve just been sitting in the shelf for a while. These came from the US Praxis Company when they went out of business. No part numbers and unbranded. More than 30 available.