The differences in the Mafell oscillating jig saws lie in the three handle designs. The STAK 65 E with a knob handle, the STA 65 E with a combined bow/knob handle and the STAB 65 E with a bow handle. All have a 700 watt motor, cutting depth of 4 inches and infinitely variable number of strokes from 500 to 3000 rpm's with 4 step oscillating stroke control.