delivery device 100 further includes an implantable device release control 108 which allows the user to cause the implantable device 104 to be released from the delivery system and left within the patient more specifically and as discussed in greater detail below the release control 108 allows the user to retract i e move proximally a detachment mandrel 118 i e an implant capture member actuating member or an elongated locking member as a distal end of the detachment mandrel 118 retracts it releases a tether 116 that secures the implantable device 104 to the delivery system 100 preferably the release control 108 is formed by the proximal end of the detachment mechanism which slides relative to the body 102 or the handle 106 a hypotube can be further included near or in the handle 106 through which the detachment mandrel 118 slides while the proximal end of the detachment mandrel 118 may simply be exposed to allow the user to move as desired a wire can also be connected to the detachment mandrel 118 allowing a user to pull the wire and therefore pull the detachment mandrel 118 proximally further the detachment mandrel 118 can be spring biased to a closed position for example by disposing a spring at a proximal end of the detachment mandrel 118 within the handle 106 in other examples this release control 108 may be a slider lever mechanical button electrical button or any other type of actuation mechanism the release mechanism 110 is preferably located within a passage of the body 102 near a distal end of the body 102 fig2 illustrates an exploded view of the release mechanism 110.