"Full tang" refers to a type of construction used in the making of a sword or knife where the blade extends fully into the handle, encompassing the entire length of the handle. In a full tang construction, the tang is the portion of the blade that extends from the blade's tip all the way through the handle.

A full tang provides structural integrity and strength to the weapon, making it less prone to breakage or separation between the blade and the handle. The tang is usually wider and thicker than the blade itself, ensuring stability and balance. The handle material, such as wood, bone, or other materials, is then attached to the tang using fasteners like pins or screws, or through traditional methods like wrapping with cord or leather.

Having a full tang construction is often considered desirable in swords and knives because it enhances durability, improves balance, and provides a more secure grip. It allows for greater force and control during strikes and reduces the risk of the blade coming loose from the handle under stress.

In contrast, a "partial tang" refers to a construction where the tang does not extend the full length of the handle. Partial tangs are generally used in lighter or decorative blades and may not possess the same level of strength and durability as a full tang construction.

When purchasing a sword or knife, the presence of a full tang construction is often considered a positive attribute as it indicates a sturdy and well-made weapon that can withstand rigorous use.