James Bond Special: Part 1 - S6-E1
Question: The three magnets Adam brought are same diameter, three times as thick as the other ten magnets. Are they also stronger than the other ten magnets?
Answer: Without going back to rewatch the episode to be certain, I believe the second batch were Rare Earth magnets, so yes.
James Bond Special: Part 1 - S6-E1
Question: Couldn't Adam, and Jamie have made ten magnets with the same diameter, but much longer than the other ten circular magnets they used? Those type of magnets would be able to contain a lot more energy, and generate more pull than the circular ones they used.
Answer: They were all rare earth magnets, but yes, the bigger ones were stronger. With that addition, strong enough to deflect steel bullets.
Friso94