What's the most dangerous tool in the workshop? A blunt knife.
(Well, I actually think its the Angle Grinder but that doesn't work for this product description..)
Anyway - it doesn't matter how nice a pocket knife you have, its useless if it's not sharp.
These kit allows you to keep up the regular maintenance of mainly smaller pocket knives. (you'd be better off with a larger wetstone like this for kitchen knives etc)
The kit includes;
The Opinel wetstone is a great size for regular sharpening of smaller blades and the steel allows you to take of any burs.
Camelia oil helps protect the surface of the blade from rust, whilst also lubricating the hinge of a folding knife.