Eva Solo's set of four knife magnets can be easily positioned on the wall.
Each of the circular magnets can hold two knives simultaneously, depending on the size of the knife. A single magnet is strong enough to hold your largest cook's knife or even your cleaver.
The magnets are surrounded with stainless steel, and has non-slip rubber fronts. The magnets screw into the wall with enclosed screws and mount the knife magnets on the fittings.

The knife magnets are easy to remove and clean, hand-wash only.
Remember to hang knives out of reach of children.