The weapon could be described as a long dagger or a short sword. It can be used to kill [[angel]]s, [[demon]]s, [[hellhound]]s and [[
archangel]] s. It has not been revealed how an angel creates a blade. It also can drain an angel of their power, as shown with [[Castiel]] when he is wounded by [[Rachel]]'s blade, which causes him to lose most of his angelic power. It is also an efficient tool for torturing an angel as shown when [[Crowley]] tortures [[Samandriel]] with one. It was shown in [[6.03 The Third Man]] that angel blades briefly give off a blue spark of light when they clash with one another.
Although [[Uriel]] stated that the only thing capable of killing an [[angel]] is another angel, it seems that the blades are still effective in the hands of a human or [[demon]]. [[Castiel]] gives his blade to the Winchesters to use on [[Anna]],<ref name="five13">[[5.13 The Song Remains the Same]]</ref> and [[Dean Winchester]] kills [[Zachariah]] with one as well<ref name="five18">[[5.18 Point of No Return]]</ref> and later another angel to save [[Ezekiel]].<ref>[[9.01 I Think I'm Gonna Like It Here]]</ref> [[Sam]] is later able to use Castiel's blade to kill two [[demon]]s.<ref name="eight10">[[8.10 Torn and Frayed]]</ref> During an angelic fight, Rachel manages to pierce Castiel in the chest with her blade, but he survives, and he kills her. [[Meg]] is later able to use one to kill [[hellhound]]s, [[Hester]] and a demon.
In [[8.07 A Little Slice of Kevin]], Castiel pulls his blade on [[Crowley]], indicating that these blades are effective against demons as well as angels. Crowley dismisses the threat, but Castiel later confirms it in [[8.10 Torn and Frayed]] and it is seen when [[Sam]] kills two [[demon]]s with one. In [[8.19 Taxi Driver]], it is shown that an angel blade can kill a [[reaper]], as demonstrated when [[Crowley]] kills the rogue reaper [[Ajay]] with one of his angel blades. In [[8.21 The Great Escapist]], Crowley has a blade melted-down into bullets for [[Crowley's Gun|a gun]]. As long as the wound is fatal, the bullets work just as well as the blade itself. Angel blades have been shown to be able to kill [[Nephilim]] in [[8.22 Clip Show]] and [[hellhounds]] in [[6.10 Caged Heat]].
In [[12.23 All Along the Watchtower]], Castiel's attempt to kill Lucifer with a standard angel blade
showed that archangels can only be killed with archangel blades.