Like all good stainless steel for cutting, our special alloy combines high resistance to corrosion with a rich carbon content to facilitate hardness and sharpness. However, this carbon content results in a certain sensitivity to acids and salt. Accordingly we recommend a good cleaning after use in water, in a saline medium, or in acidic fruit.

We also recommend, in the interest of good operation, the application of a little AITOR-OIL to the springs and friction areas.Each part has its function. The blade should not be used for opening cans or uncorking bottles. Nor should it be used for levering, launching, or striking.A half-open piece exerts maximum pressure on the spring, hence it is advisable not to have two pieces activated by the one spring, which could break under the tension.We recommend that at regular intervals you use a good metal polisher on the brass or nickel parts, since they are highly sensitive to the medium they come in contact with.


All cutting tools, including AITOR penknives and knives in general, should be sharpened regularly. Use the appropriate oil, and proceed using the right angle. We now look at how this should be done.

To ensure that the steel particles produced do not become incrusted in the stone, in which case they will reduce its sharpening efficacy, we recommend the application of a little AITOR-OIL. Do not use ordinary lubricants, which will block up the pores of the stone.The ideal sharpening angle is 12º. The more closely this angle is approached, the more effective the sharpening will be. With a little practice you will find it easy to get the angle just right.Use a circular movement, without separating the blade from the stone, to ensure a consistent edge.Turn the blade around and repeat the operation. Continue until you have the edge you want.