Make sure you know what's in your hand baggage, and be sure to remove any of these items:
Devices capable, or appearing capable, of being used to cause serious injury by discharging a projectile, including:
Devices designed specifically to stun or immobilize, including:
Objects with a sharp point or sharp edge capable of being used to cause serious injury, including:
Tools capable of being used either to cause serious injury or to threaten the safety of the aircraft, including:
Objects capable of being used to cause serious injury when used to hit, including:
Explosives and incendiary substances and devices capable or appearing capable, of being used to cause serious injury or to pose a threat to the safety of aircraft, including:
Items that should not be in checked baggage may be removed by airport security personnel, and in such cases the airline is not liable for any loss. So, be mindful when packing your checked bags, and make sure you don't include any of the following:
Read more on the website of the Swedish Transport Agency