Carpet Chair Mat, 45" x 53'', Medium-Pile, Clear (28592) Enjoy a smooth rolling surface while safeguarding your medium pile carpet from wear and tear. Extend the durability of your medium pile carpet (up to 3/4" thick including padding depth) by shielding against chair caster wear and tear. The ideal addition to your workspace, this chair mat offers a smooth surface that boosts ergonomic comfort by letting your rolling office chair move freely. Simple to manage, this chair mat includes rounded AnchorBar cleats (studs) that keep your mat in place and are gentle on carpets and fingers (no sharp spikes)