The rotator and various attachments are shown below.
The rotator has a continuously variable range of speeds. The inserts demonstrate centripetal force and centrifugal force (a pseudo force that arises from rotational motion).
The attachments are shown below. Rotating any one at a high rate causes some part to be flung outward. For the centripetal force apparatuses (the first two shown below), the mass that is flung outwards by rotation is attached to the rest of the device, and this creates the inward-pointing centripetal force that keeps the masses from being flung from the apparatus.
If the mass is free to move without any inwards-pointing force holding the mass to the rest of the apparatus, as with the centrifugal force apparatus shown below, the mass is flung radially outwards, unimpeded. Commonly referred to by the misnomer "centrifugal force," this processes does not actually demonstrate the appearance of an outward-pointing centrifugal "force" but rather the absence of an inward-pointing centripetal force.