Cheap blackboard magnets that can hold approx

You cannot write on the board with whiteboard markers - shadows will be left on the board from the marker when the board is wiped clean

MGOe: 38-40

use the larger Bulldog clamp of 63 mm

you need a magnet that can carry at least 39 kg (depending on what you want to fishfor)

Kraftig magnet "THE BOSS", Metal 24 mm., 3-pak Auto-translated (EN) Cheap blackboard magnets that canPowerful office metal magnet. Easy to pick up, and with a design that is perfect for the executive office. Strength: approx. 3,2 kg. Height: 24 mm. Base diameter: 20 mm Magnets by Trendform, name: THE BOSS. Pack of 3 very strong magnets. The magnet consists of a neodymium magnet fixed to a metal grip. A high quality magnet manufactured in Switzerland. Choose "The Boss" for the stylish and exclusive look.