Rubber Coated Neodymium Pot Magnet - Diameter 88mm x 35mm with Nylon P Clamp D_29mm This ferrite magnet has a

This ferrite magnet has a  magnetic flux reading of  1982 Gauss and a pull force of  9 kg

The fitting screws are also stainless steel and included with the steel plates but the separator bar components are sold separately

you can easily cut to size with a pair of scissors or a Stanley knife

Blue Pin Whiteboard Magnets – 12mm Diameter x 22mm | 12 Pack

If you want a lower profile on the weekend

Rubber Coated Neodymium Pot Magnet - Diameter 88mm x 35mm with Nylon P Clamp D_29mm This ferrite magnet has aMagnetic Product Description: This rare earth pot magnet has a diameter of 88mm, a total height of 35mm with a nylon p clamp, and the closed loop is 22mm. This cable mount magnet has a pull force of 42kg. It is identified by the AMF magnet part number RCND88P.