Letter openers, also called paperknife, are available in many different varieties such as the automatic letter opener, which is motorized and can slit many envelops at a time. These letter slitters are especially useful in large organizations that receive hundreds of mails daily. They allow for quick slitting of envelops leaving a neat cut and saves valuable work time. They are made of metals as well as plastics. Metal ones are durable especially when they are used frequently as compared to the plastic ones. The Gunblade letter opener is one of the collectors' item that is desirable and a must-have item for the Final Fantasy fans.

The Gunblade letter opener is a fancy version of the original gunblade that featured in the Final Fantasy game series without any sharp edges. The gunblade is a famed weapon that was introduced in the Final Fantasy VIII computer game series. It is a hybrid weapon that is a combination of a gun and a blade. This weapon is different from a barrel gun in the sense that the barrel is replaced by a sword or a knife. This gunblade, unlike conventional gun, does not fire bullets; instead it sends a shock wave through the gunblade causing maximum damage to the target.

Gunblade letter openers are a kind of knife without the sharp edges of a knife. It is in function a letter opener with the looks of a gunblade. It is used to slit papers or envelops. They are a handy tool to open the sealed envelops, instead of tearing it directly by hand, which may lead to tearing off its contents.