Heavy Duty Adhesive Pads Original 3M stick adhesive pads, double sided self sticky black adhesive pads, stronger than most adhesive pads. Can be used to install large and heavy tools on smooth surfaces such as car paint, plastic, glass, wood, metal, and ceramic tiles. Multipurpose Black 3M Pads 20 pcs 4 cm x 4 cm squares, 20 pcs 4 cm diameter rounds, and 20 pcs 3 cm x 5 cm rectangle pads. All pads are 3 mm thick, ideal for wall hanging, carpet, car, home, and office decor. Easy to Install 1. Clean the surface. 2. Remove the adhesive liner. 3. Blow off any dust with a blower or air. 4. Position and press firmly for 10 seconds to achieve optimal adhesion. Strong and Durable 3M Adhesive The 3M backing provides maximum stickiness—reaches full strength in 72 hours. Overlapping application does not affect performance. Can be used as an alternative to rivets, screws, spot welds, and liquid adhesives. Notes: 1. Do not apply on very soft, rough, textured, greasy, or leather surfaces. 2. Ensure the surface is clean and dry before application. 3. The adhesive pad is for one-time use only. 4. Wait at least 24 hours before loading to ensure maximum bond strength.