brittle plastic [SEP] there are not too many options for something like thisi wish they would make it out of better materialthe plastic is cheap and brittle it cracks if you look at it the wrong waythe disc isn t even secure on the wand it easily skips off and will crash to the ground and crackthe cover cracks quickly if you tighten it too much even a little too muchthey should have made this one with a more flexible durable plastic or rubberthe beads are cheap plastic toomost of them don t even roll they get stuckbut as i said there aren t too many other options for sale other similar units are sponges on sticks sounds awful