Deadly weapon of the particular crime is inherently more dangerous. In some jurisdictions, a distinction is made between deadly weapons and destructive devices, such as explosives, incendiary or poison gas bombs, grenades, landmines, rockets, missiles, or similar devices, including the unassembled components from which such devices can be made. A deadly weapon "per se" is usually defined as a firearm and may include knives of a certain length (usually three inches or longer, depending on jurisdiction). Statutes list weapons such as switchblade, gravity knife, ballistic knife, stiletto, sword, dagger, blackjack, brass knuckles, nunchaku (fighting sticks), shuriken (throwing stars), among others. Any object
Fencing practice and techniques prevents the arrival of that attack by closing the line in which that attack is to finish". In practice, sabre referees tend to look at the point of blade contact: contact of a defender's forte with an attacker's foible is generally counted as a parry, whereas contact of a defender's foible with an attacker's forte is incorrectly executed, and priority stays with the attacker. Some fencers refer to a retreat that makes an attack fall short as a "distance parry", but this is informal use: an actual parry requires blade contact. Modern fencing also includes the addition of penalty cards