These series of expanders are completely interchangeable with the Airetool design expander on the market. For example, a M-56 Mandrel is part #43358. Made by Thomas C. Wilson with excellent quality and performance.
1 1/2-inch and 2 1/4-inch roll lengths are available. Inquire for 1 1/2-inch part number.
The assembly comes complete with mandrels, rolls, cage, and collar with a 1/16-inch standard recess.