So just like many of Mova's robot vacuums you'll get a handy 2-in-1 brush that also reveals a retractable hook-blade to cut any tangled long hairs in the rotating brush. However, in my experience the plastic hook is too bulky to get into the small crevices - so the next time you want to detangle and remove that stuck on hair in the roller without completely disassembling the mechanism, I suggest just using some nail clippers on your Z50. The tiny blade is sharp and tiny enough to cut through that ring of hairs but precise enough not to damage your Z50. So that's my handy tip!