Easy To Use: Just move the outside, the inside can be moved and cleaned, while cleaning the outside. Non slip griped handle improving cleaning action. Effective: Good absorb ability and magnetic attraction, suitable for use with varying glass thickness, which can effectively the algae adsorbed in the aquarium, no need to worry about soiling hands. Stable: suction is not afraid of falling, it is easier to clean the fish tank. Safe: Anti Scratch cleaning pads Will not scratch the glass. Exquisite design:anti-skid , a small, light work of art, easy for the holder to carry.