Heavy Duty Adhesive Pads Original 3M stick adhesive pads, double sided self-stick black adhesive pads, stronger than most adhesive pads. Can be used to install large and heavy tools on car paint, plastic, glass, wood, metal, and ceramic tiles and other smooth surfaces. 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 with a thickness of 3 mm, ideal for wall hanging, carpet, car, home, and office decor. Easy to Install 1. Clean the surface. 2. Remove the adhesive liner. 3. Use a blower or wipe to remove dust from the tape area. 4. Fix in the installation position and press firmly for 10 seconds. This ensures optimal adhesion. Strong and Durable 3M Adhesive The 3M backing provides maximum stickiness—reaches full strength within 72 hours. Overlapping application does not affect performance. Can be used to replace rivets, screws, spot welds, and messy liquid adhesives. Notes: 1. Do not apply the 3M adhesive pad on very soft, rough, textured, greasy surfaces or leather. 2. Ensure the surface is clean and dry before application. 3. The 3M adhesive pad is for one-time use only. 4. Wait at least 24 hours before loading to ensure maximum bond strength.