If you are using a magnetic sweeper for a large surface area, the best type to choose would be the trailer magnetic sweeper. This is because it can be easily attached to a variety of vehicles and moved over a large area easily.
If you are using a magnetic sweeper for small tasks and do not want to take a long time collecting ferromagnetic materials, then the best variety to choose would be the push magnetic sweeper. This is because it is easily manoeuvred around small areas quickly, and is also relatively easy to use.
If you are only sweeping over a small surface area, then the best magnetic sweeper to use would be the hand-held type. This is because it can be easily carried over the surface area and collected a large quantity of ferromagnetic material.