Non-Slip Rug Pads For RUG-ON-CARPET ANTI-SLIP. DESIGNED FOR MEDIUM PILE CARPET. 4 Pack. Intended To Limit SMALL Rugs/Exercise Mats/Door Mats From Moving On MEDIUM PILE CARPET. BRAND NEW DESIGN! RUG-ON-CARPET ANTI-SLIP PADS. Designed for MEDIUM PILE Carpet. Keeps a DOOR MAT (small rug - under 2'x3') from shifting on top of carpet. For small, medium & large rugs please use our Carpet Anchor 8 Pack or 12 Pack. Includes 4 X (5" Diameter) durable, plastic, barbed pads. Includes adhesive backing to adhere to the underside of the door mat - no glue required. Carpet Anchor Pads are designed for use on MEDIUM PILE Carpets. *Not ideal for use on berber, commercial grade low pile carpets, or plush high pile carpets. Place the pads in the carpet with the hooked side facing down and give each disc a 1/4 turn clockwise to anchor it into the carpet. Then remove the adhesive backing and place the door mat on top of the anchored pad. Please Check Out Our Sticky Discs Rug Pads For Rug On Floor Anti-Slip. Ideal For Anti-Slip On Hardwood, Tile, Cement etc.