SEMAT ultrasonic installations (SUI) Sk-UIT series (Sk-UIT100, Sk-UIT350, Sk-UIT450 and Sk-Blisk) are designed for the ultrasonic strain-hardening (USH) of complex shaped parts in a limited space by means of kinetic energy from moving working bodies (steel balls) with (or without) the use of finely dispersed powder-like alloying materials.