These N52 neodymium disc magnets are seriously powerful for their size! Measuring 3/4 inch in diameter and just 1/16 inch thick, they pack an incredible magnetic punch thanks to their N52 grade - that's the strongest grade available for neodymium magnets. This 30-pack comes with spacers and features 3M 4920 VHB double-sided adhesive backing, making them super convenient for all kinds of projects. The nickel-copper-nickel triple coating provides excellent corrosion resistance, so they won't rust when exposed to air. Perfect for crafting projects, displaying photos on metal surfaces, holding greeting cards on refrigerators, organizing papers in the office, or any situation where you need strong but discreet holding power. Just remember - these magnets are seriously strong, so be careful with your fingers when separating them. Let the adhesive cure for 24-36 hours for maximum holding strength, and avoid using them near pacemakers or with small children. The included spacers help prevent the magnets from snapping together too forcefully when stored. Whether you're a DIY enthusiast, crafter, or just need reliable magnets for organization, this 30-pack gives you plenty to work with. They're one of those simple tools that you'll find uses for everywhere once you start using them. Just handle with care - that magnetic power is no joke!