Package includes: The diameter of the double-sided adhesive scratch is 20 mm. Contains 300 pieces of hook and 300 pieces of loop (1 set = 1 piece of loop and 1 piece of hook, total 300 sets; 600 pieces). Stronger Self-Adhesive: Our self-adhesive hook and loop are very strong and can be stuck to any flat surface. They leave no residue, do not damage, are waterproof and weather resistant. We have adopted high-density nylon which provides excellent adhesion and durability. In addition, the entire structure is discreet and does not take up space. It is an indispensable household helper. Compatibility: These round self-adhesive scratch pads can be attached to most objects, especially clean and smooth surfaces of paper, plastic, glass, leather, metal, etc. Easy to Use: Our hook and loop self-adhesive scratch pads are easily detached from the paper roll, without glue residue, without damaging the surface of the object. 600pcs adhesive dots can be used for a long time. 1. Wipe the surface clean first and keep it dry. 2. Peel off the coins from the hooks and stick them, wait for 10 minutes. 3. Stick the loop coins on the object, wait for 10 minutes. 4. Stick together. Wide Applications: Our hook and loop self-adhesive scratch pads are easy to detach ... hooks are great for school and educational projects. They can be used to stick various objects to boards, index cards, binders and more. Safe for children. Dot stickers are also great for organizing at home, in the office, etc.