Ferrite Pot Magnet with M4 Internal Thread for Arts, Crafts, Model Making, DIY and Hobbies 32mm dia x 7mm thick 4.1kg Pull Pack of 4

STRONG RARE EARTH MAGNET. Each magnet can support 4.1kg pull vertically from the magnetic face when in flush contact with a mild steel surface of equal thickness. RESISTANT TO CRACKING & CHIPPING. An added advantage of pot magnets is that they are resistant to chipping or cracking following constant impact with a steel surface. MULTIPLE USES. Ferrite pot magnets are ideal for Arts, Crafts, Model Making, DIY, and Hobbies. EXTERNAL THREAD. These Ferrite pot magnets feature an M4 metric internal thread that allows them to be screwed together with objects that have a compatible external thread. ONLY MAGNETIC ON COUNTERSUNK FACE. Outstanding value for money, these ferrite pot magnets are made of a ferrite magnet sunken into a steel shell meaning that the north pole is on the centre of the magnetic face and the south pole is on the outer edge around it. SPECIFICATIONS. 32mm diameter x 7mm thick with a M4 Internal Thread.