Due to an update, this article may be out of date.
Reason: Due to an update on 06 February2017, Raptor key pieces were made 150% more common, and the contents of the chest were altered in quantity accordingly. You can help improve this page by editing it.
The Raptor key is an item used to unlock the Raptor's chest next to Burthorpe bank. Each of the monsters that drop the key pieces require level 96 Slayer to kill, in addition to being on the respective slayer task in order for them to drop.
Once all four key parts are obtained, simply use one of the pieces on another. This will create the key, with a game message stating "You combine the four key parts into a reward key for the Raptor's chest of slaying.".
Following the Patch Notes on 6 February2017, Raptor key pieces were made approximately 150% more common, and the rewards contained within the Raptor chest were reduced to compensate for the increased drop chance.[1]
References
^Mod Shogun. Raptor Chest Rewards Nerfed? Why?. 26 February 2017. "So the keys were made more common, around 150% more common so we had to reduce the amount of rewards from the chest to compensate."*