Rare earth magnets / spacers.
Great for many DIY projects.
Playing with large bundles of these magnets can easily result in pinching your fingers with the force of pliers.
They can also shatter and spark with hard impacts, so safety glasses should be worn.
Definitely NOT suitable for children due to the serious health problems if swallowed.
Avoid using near to credit/debit card due to the magnetic strips and electronic equipment (e.g., pacemakers, mobiles, media devices, monitors, watches, TVs etc).
RARE EARTH MAGNETS
£2.40p for ten or
£6.00p for fifty
£2.50p for ten or
£6.50p for fifty
£5.00p for ten or
£14.00p for fifty
The 8mm can also be used to extend protected lithium batteries with recessed contact points;
Like protected 18650, CR123A, 14500 etc and for spacing batteries in chargers.