The MSS-14H hydraulic shrinker stretcher is 100% made in the USA from solid plate steel and has a deep 7" throat allowing even the deepest of metal working. But the MSS-14H is unlike anything on the market to date, the MSS-14H is actually hydraulically driven by a 110 volt hydraulic system on the down stroke for great power and air pressure assisted on the upstroke for faster movement. This system allows for between 30 and 40 stokes per minute.