Highly durable stainless-steel mop stick : the expandable rod is made of stainless steel, as opposed to plastic, which makes it highly sturdy and durable. Built-in quick lock / unlock feature: before you begin floor mopping, the simple lock system on mop stick allows you to adjust the height of the mop according to your preference. Lightweight mop stick: no heavy-duty effort needed while squeezing the water. Easy handling yet sturdy in use spin mop stick.