10 x Round Neodymium Magnets, M5 Countersunk Disc Permanent Rare Earth Strong 20 mm 3

POWERFUL MAGNETS - Each magnet can bear a 3.5kg vertical pull of the magnetic face when it is in flush contact with a mild steel surface. Magnet layer: Ni + CU + Ni triple layer coating. The best coating available, which provides a shine and anti-rust protection for magnets. DIY projects and science experiments - Fridge magnets, shower door, work or office, scientific purposes, arts and crafts or school. Magnet dimensions: 20 mm diameter x 3 mm thick with a countersunk hole of M5 in diameter for fixing, tolerance of +/- 0.1 mm. Brittle or break if allowed to splinters slam together. Please note: these are strong magnetism magnets, not a toy for children. ! ! Also not suitable for people who are equipped with heart trainers or defibrillators, please keep them away from small children