Your Kurouto magnetic knife holder is finished with an all natural blend of food grande mineral oil and beeswax. It richens the look and feel of the natural wood and isn't subject to scratching like a hard permanent finish. If the sheen dulls over time, you can easily apply more oil and wax to restore it.
Your Kurouto magnetic knife strip contains ultra powerful rare earth magnets embedded in a continuous manner in the block. It is magnetic along the front side only, so it will not magnetically stick to your fridge. You can however mount it to a surface that you don't wish to drill into with strong doublestick tape or adhesive.
Please see the Installation tab in the description above. Your magnetic knife block will come with detailed instructions, mounting hardware for multiple surfaces and an easy to use template.
Your magnetic knife block is backed by a limited lifetime warranty against defects. The magnets are permanent and the wood block won't wear out with normal use.