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, [[reaper]]s, and regular [[Nephilim]] ([[Jack Kline]] being the product of an [[archangel]] makes him invulnerable to angel blades). It was revealed by [[Castiel]] that all angel blades have been touched by [[God]], whether God actually created them is unknown. An angel blade can also 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 that angel blades briefly give off a blue spark of light when they clash with one another.<ref name="six03">[[6.03 The Third Man]]</ref>
Although [[Uriel]] stated that the only thing capable of killing an [[angel]] is another angel,<ref name="four16" /> 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 [[Gadreel]].<ref name="nine01" /> [[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.<ref name="six18"[[6.18 Frontierland]]</ref> [[Meg]] is later able to use one to kill [[hellhound]]s,<ref name="
eight14">[[ 8. 14 Trial and Error]]</ref> [[Hester]]<ref name="seven21" /> and a demon with a blade.<ref name="eight17">[[8.17 Goodbye Stranger]]</ref>
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.<ref name="eight19">[[8.19 Taxi Driver]]</ref> The Winchesters have also been able to use angel blades to kill reapers<ref name="nine03" /> as well as Castiel.<ref name="twelve09">[[12.09 First Blood]]</ref> At one point, Crowley has a blade melted-down into [[Angel-Killing Bullets|bullets]] for [[Crowley's Gun|a gun]]. As long as the wound is fatal, the bullets work just as well as the blade itself.<ref name="eight21">[[8.21 The Great Escapist]]</ref> The [[Apocalypse World]] [[Bobby Singer (Apocalypse World)|Bobby Singer]] did something similar resulting in bullets and shotgun rounds capable of killing both angels and demons.<ref name="twelve23">[[12.23 All Along the Watchtower]]</ref>