1. Restore vacuuming efficiency, no residue on the ground: After using the old roller brush for a long time, the bristles will wear out and become shorter and harder, and cannot penetrate deep into the floor gaps. Replace the roller brush in time, the bristles can effectively raise the dust again, and with the suction power of the vacuum cleaner, it can be sucked clean by pushing it once, and there is no need to drag it back and forth repeatedly. 2. Smooth and low noise + no damage to the ground: smooth rotation and low running noise. The bristle material is mild, suitable for wooden floors, tiles and short-haired carpets, and does not scratch the surface. The old roller brush bearing may make abnormal noises or rotate stutters after wearing. 3. Lift welt cleaning, cover the corners and furniture edges: The replaced roller brush has full bristles at both ends, which can fit the wall baseboard and the bottom edge of the furniture, effectively absorbing dust from the corners. The worn old roller brush has sparse bristles at both ends, and the corners are prone to leaving a gray line. 4. Easy to clean structure – rinse and clean: The roller brush supports washing as a whole (please dry it completely before using it after cleaning). The dust accumulated at the root of the bristles can be rinsed directly under the faucet, and the roller brush that has not been cleaned for a long time will become hard due to dirt accumulation, affecting the cleaning effect. 5. Easy to disassemble, no tools required: This roller brush can be disassembled without a screwdriver. Press or slide the brush compartment cover, take out the old roller brush, and put it in the replacement roller brush. It is recommended to check the condition of the bristles every 3-6 months. If you find that the roller brush has difficulty turning or the cleaning effect decreases, it means that it needs to be replaced. Item package includes: 1 piece Main brush