Usually surprise is an issue--they can jump out of your hands and snap together from a surprising distance before you realize what is happening. They are strong enough that they can fly into each other or to a piece of iron or steel with such velocity that they can break and send sharp 'shrapnel' flying about!
eBay
Powerful TV Soundbar Wired and Wireless Bluetooth Speaker Stereo Home Cinema Sound System with FM Radio Music Center Sound Bar
Aliexpress UK
Their exceptional strength and elegant design make them an indispensable tool for a range of applications. Crafted from high-grade N42 (NdFeB) neodymium, ensuring exceptional strength and durability.
eBay
ZEALOT-S97 80W Bluetooth Speaker Powerful Wireless Speaker with Portable Handle, for Party, Camping,RGB Colorful Light
Aliexpress UK
They have a high magnetic field strength and have a high coercivity (which makes them magnetically stable). Usually surprise is an issue--they can jump out of your hands and snap together from a surprising distance before you realize what is happening.
eBay
Rechargeable Powerful 7 Motors Heating Belly Fat Slimming Massage Belt Waist Lumbar Spine Support Abdominal Muscle Training Band
Aliexpress UK
Grade: N50. Wear safety glasses when handling non-coated magnets as forceful. N42 Neodymium Magnet. Material: NdFeB- Neodymium. Magnet Safety warnings These include: cassette tapes, floppy disks, credit cards, video tapes, and computer hard drives.
eBay
Rockmia EBS-630 Mini Portable RGB Speaker 5W Bluetooth 5.3 Fabric Mesh Powerful Bass TF Type-C Wireless Sound System
Aliexpress UK
Neodimium Magnet Black Very Powerful N52 Grade Rare Earth Magnet. Strong Force. Free Royal Mail Delivery Fast Despatch Buy 2 Get 1 Free
eBay
5/10M Fitness Rubber Power Bands Rope Diameter 14mm Strong Powerful Strength Training Sports Elastic Resistance Rope For Friend
Aliexpress UK
Spider Magnet's shop is by far the best place to buy high quality neodymium magnets on eBay. We have over 40 years experience in the industry. Our versatile magnets are incredibly high quality, very strong for their size and precisely machined. Our magnets are more than competitively priced and our customer service and experience are second to none. The magnets in this listing are grade N35. Our magnets are triple coated nickel-copper-nickel for good corrosion resistance and these magnets are magnetised axially giving a north pole on one flat face and a south pole on the opposite face.
eBay
A89E-Gyro Wrist Ball Bracket Gyroscope Booster Powerful Ball Wrist Ball Exercise Exercise Arm Gym Fitness Equipment
Aliexpress UK
Discover the super strong Neosmuk magnet with its incredible 350 lb pulling force, designed for both industrial and recreational purposes. Whether you're exploring underwater adventures or handling heavy-duty tasks, Neosmuk's precision engineering ensures reliability and efficiency.
eBay
New 5-10M 8 10 12 14 18mm Solid Fitness Rubber Power Bands Rope Strong Powerful Strength Training Sports Elastic Resistance Rope
Aliexpress UK
Our products achieved the world’s highest levels of residual magnetic flux density Br, intrinsic coercive force Hcj and (BH)max. A wide variety of characteristics provides a choice of most suitable type, enabling drastic down-sizing, slimming, and increased power of magnetic devices.
eBay
DOSS Home Bluetooth Speaker 80W Powerful Sound Bass Subwoofer Sound Box TWS Stereo Pairing 18 Hours Playtime Wireless Speakers
Aliexpress UK