These standard antistatic mats are ideal for use with computers & other electronic equipment. Chemically formulated to safely neutralize static electricity before it can harm computer without using ground cords. Designed & 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 & slip-resistance. Beveled edge for smooth on & off chair movements.