Heavy Duty Adhesive PadsOriginal 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, car paint, plastic, glass, wood, metal and ceramic tiles and other Smooth surface . Multipurpose Black 3M Pads20pcs 4cm x 4cm Squares, 20pcs 4cm Diameter Rounds and 20pcs 3cm x 5cm Rectangle Pads. All of these Thickness is 3mm, its perfect for wall hanging, carpet, car, home and office decor. Easy to install1. Clean the surface. 2. Remove the adhesive. 3. Use a blower to blow off the tape. 4. Fix it in the installation position and press firmly for 10 seconds. In this way, the best viscosity is obtained. Strong and Durable 3M AdhesiveThe 3M back sticker has the maximum stickiness - 72 hours Reached (overlapping application does not affect the application), can be used to replace rivets, screws, spot welds, and messy liquid adhesives.NOTES: :1 - Please don't stick the 3M adhesive pad on very soft, rugged, texture, grease surface or leather surface. 2 - Make sure the desired surface is clean and dry. 3 - The 3M adhesive pad is one-time use. 4 - It is recommended to wait at least 24 hours ensure the sticker get the best stickiness before use.