There is no requirement to remove the AHK3-rf from the GTFO-WRIST-STRAPĀ® to open handcuffs.
Simply remove the wrist-strap from your wrist, pull the cord into the channel of the ahk3-rf and then insert into the key-way.
If you want to remove the key you will require tools. Insert a piece of metal (R-Clip, hair-grip etc.) into the two holes of the AHK3-rf and then use needle nose pliers to rotate the TWISTLOCK to the open position.