These standard antistatic mats are ideal for use with computers and other electronic equipment. Chemically formulated to safely neutralize static electricity before it can harm computer without using ground cords. Designed and properly weighted for firm, low-pile carpets with padding. Unique notched stud design grips carpet without piercing or damaging carpet backing. Textured surface for scuff-resistance and slip-resistance. Beveled edge for smooth on and off chair movements.