All Casström knives come with a 25 year warranty. The Casström Information and Warranty Certificate applies to all knives and comes in the box that all the fixed blade knives are delivered in. The document includes the following information:

25 year warranty

This knife is made of sturdy materials and, if properly maintained, will last for a very long time. We offer a 25-year warranty from the date of purchase. We will repair or replace the knife if it breaks, however it is important that you keep your receipt or proof of purchase and strictly follow our care instructions. Read more about the warranty and maintenance guidelines below.

What is included in the warranty?

Casström AB issues a warranty against faults for proper use as a knife for 25 years from the date of purchase if you follow the maintenance guidelines. In addition, the knife must only be used under conditions that a knife should be expected to perform, and not abused. This warranty does not apply to damage caused by the knife being thrown, prying, accident, improper use (such as a screwdriver, hammer, lever, etc.), improper care and maintenance, neglect or normal wear and tear.  

Special note regarding "batoning"

Batoning is the technique of cutting or splitting wood by using a baton-sized stick or soft mallet to repeatedly strike the spine of a sturdy knife, chisel or blade to drive it through wood, similar to how a froe is used. Casstrom knives are normally ok to be used for batoning using clean wood free from knots with the following caveats: The blade snapping on Scandi grind knives when used for batoning, is covered under the warranty. Chipping or edge damage, tip damage (last 5mm) and damage to the handle when batoning however are NOT covered under the warranty. Casström knives with a Full Flat grind are NOT covered by warranty when used for batoning.

What is not included in the warranty?

Problems such as steel patina/rust, natural wood movement, some asymmetry in grinding or shaping of the handle and the wood pattern appearance are not covered under warranty. If you buy a knife with any of these imperfections and feel that you are not satisfied with the knife, please contact us and in some cases return the unused knife to get it replaced. Accessories for the knife such as the leather sheath, fire steels, and leather straps are considered consumable items during this time frame and are not covered by the warranty.

Care and maintenance advice and other things to consider:

• A carbon steel blade (including Sleipner) will develop a darker colour or "patina" over time due to oxidisation, which is normal.
• If a carbon steel blade becomes wet or is used in damp or salty areas, it will rust. This applies even if you cut fruit or foodstuffs which contain acids. It is therefore recommended to wipe the blade clean and dry after use.
• Protect the steel (including the exposed tang) with olive oil, mineral oil or wax and allow the blade to be stored separate from the leather sheath when you are not wearing it, as the leather may need to dry out.
• Never put your Casström knife, regardless of the type of blade steel and/or scales, in a dishwasher.
• Re-sharpening is recommended on flat sharpening systems e.g. diamond stone, Japanese waterstones or ordinary traditional oil stones.
• Scandi grinds are best sharpened freehand with stones (natural or compound), ceramics or diamond systems that are flat so that the length and breadth of the bevel can be placed flat on the abrasive surface ensuring a consistent angle of sharpening.
• A Scandi grind knife can benefit from a secondary micro bevel to increase its durability. A 20-25 degree angle per side (40-50 degrees is recommended if the knife will be used for a lot of batoning or other heavy duty tasks, particularly at temperatures below 0 degrees Celsius.
• We recommend sharpening a Full Flat grind’s secondary bevel with an angle of 15-20 degrees per side (30-40 degrees in total) with any system or technique that ensures a consistent angle.
• Stropping the final edge with leather works for all styles of grind.
• Some movement of wood is natural, and this should be expected over time. Oil the handle a couple of times a year with boiled linseed oil or another suitable oil mixture, for example, Danish oil or Ronseal Finishing Oil. In the first year, we also recommend that you oil the handle more regularly, e.g. once a month or after each outing. If the shaft becomes wet and moves, gaps may develop between the shaft and the blade, these gaps can be sealed with for example beeswax or epoxy putty.
• Standard leather care products should not be used, especially those that are designed to make leather more supple such as grease or dubbing. This ruins the sheath’s ability to maintain its stiffness to protect the knife and user. We recommend Casström Lapland Leather Wax to protect the sheath and increase its durability.

We hope you enjoy your Casström knife, and may it give you many years of satisfying use. Keep the advice above in mind so that you never have to remember the old Nordic proverb: A man without a knife is a lifeless man!