How to judge whether the material of the knife is qualified?

To judge whether the material of the knife is qualified, you can observe from three points: first, look at the appearance. A qualified knife has no obvious scratches, bubbles or color differences on the knife body, and no chipping or curling on the blade; second, try the hand feel. It has no burrs or discomfort when held, and is smooth without jamming when opening and closing (folding knife) or swinging (fixed blade knife); third, check the label. Regular products will be marked with material (such as stainless steel, titanium alloy), manufacturer and other information. Those without labels or with vague labels should be chosen with caution.

How to safely clean the knife after use?

When cleaning the knife, first ensure that the blade is retracted (folding knife) or fixed (fixed blade knife) to avoid scratching. You can use warm water with a small amount of neutral detergent, wipe the knife body and blade with a soft cloth to remove stains and residues; if you have cut ingredients (such as meat, fruits), you need to wipe them thoroughly to avoid residue breeding bacteria; after cleaning, dry it with a dry cloth, place it in a dry and ventilated place to air dry, and then store it.

Which is more suitable for outdoor use, a fixed blade knife or a folding knife?

Outdoor use should be selected according to the scenario: the fixed blade knife is integrally formed, with high blade strength and good stability, suitable for heavy-load operations such as cutting thick branches and ingredients, and not prone to failure, but it needs a sheath when carrying, which is not convenient for storage; the folding knife is small in size and easy to carry, suitable for light daily outdoor use (such as peeling, cutting ropes), but its strength is slightly inferior to that of the fixed blade knife, and it is not suitable for high-intensity operations.

Can the blade of a multi-tool knife be replaced? How to replace it?

The blades of most multi-tool knives are replaceable. The replacement method is as follows: first, fully unfold the blade, find the fixing screw at the connection of the blade, loosen the screw with the matching screwdriver, and take out the old blade; align the new blade with the installation slot, adjust it in place, then tighten the fixing screw to ensure that the blade is not loose or shaking. Wear protective gloves when replacing to avoid being scratched by the blade.

What should I do if the locking device of the folding knife fails?

The failure of the locking device of a folding knife may be due to loose locking spring, wear or foreign body jamming. First, check whether there is dust or debris in the locking part and clean it with a brush; if the spring is loose, you can gently adjust the angle of the spring to make it clamp normally; if the locking part is seriously worn, it is recommended to contact the brand after-sales service for maintenance or replace the corresponding part to avoid accidental retraction of the blade causing injury.

How to remove slight rust on the blade of a fixed blade knife?

For slight rust on the blade of a fixed blade knife, there are two methods to remove it: first, gently grind the rusty part with fine sandpaper, wipe it clean with a dry cloth after grinding, and then apply anti-rust oil; second, soak the rusty part in white vinegar for 10-15 minutes, wipe off the rust with a soft cloth, then rinse it with clean water, dry it and apply oil. Pay attention to keeping the knife body dry daily to reduce the probability of rusting.

Can multi-tool knives and folding knives be carried on public transportation?

According to the relevant regulations on domestic public transportation, if the blade length of a multi-tool knife or folding knife exceeds 15 centimeters, it belongs to the category of controlled knives and is prohibited from being carried on subways, high-speed rails, airplanes and other public transportation; if the blade length is less than 15 centimeters, you need to consult the local transportation department in advance, and it is still prohibited in some areas. It is recommended to understand the relevant regulations before traveling to avoid violations.

How to maintain a fixed blade knife daily to extend its service life?

Daily maintenance of a fixed blade knife needs to pay attention to three points: first, wipe the blade and knife body with a dry cloth in time after use to avoid water stains causing rust; second, apply a small amount of anti-rust oil on the blade surface when not in use for a long time, and store it properly in a dry and ventilated place; third, avoid cutting hard items (such as metal, stones) with the fixed blade knife to prevent the blade from chipping and deformation, and grind it slightly with a whetstone regularly to keep the blade sharp.

What should I do if the folding knife does not open or close smoothly?

If a folding knife does not open or close smoothly, it is mostly caused by dust, oil stains entering the gap or loose rotating shaft. First, wipe the connection between the blade and the rotating shaft with a dry cloth to remove dust and oil stains, then drop 1-2 drops of special lubricating oil (avoid using edible oil), and open and close it gently several times to make the lubricating oil evenly distributed; if the rotating shaft is loose, you can slightly adjust the fixing screw on the side of the knife body, with the strength suitable for smooth opening and closing without loosening.

How to correctly use the different functional modules of a multi-tool knife?

The functional modules of a multi-tool knife should be used according to their purposes: the blade is for basic operations such as cutting and peeling, the screwdriver module is suitable for screws of corresponding specifications, the bottle opener is for opening bottle caps, and the scissors module is suitable for cutting light items. When in use, ensure that the corresponding module is fully unfolded and locked in place, avoid operation when it is not fixed, and fold and store it in time after use to prevent the module from loosening and scratching.