A device has a hollow guide shell including an injection end and a longitudinal axis. An actuator magnet is disposed in the hollow guide shell. An injection pin is coupled to the actuator magnet. A driver magnet is positioned on the device radially outward from the actuator magnet. A fluid cartridge is disposed in the injection end of the hollow guide shell, the fluid cartridge including a needle and a plunger. The driver magnet selectively exerts an injection force on the actuator magnet in a direction oriented towards the injection end of the hollow guide shell to engage the injection pin with the fluid cartridge. A liquid, gas or other agent can selectively be ejected from the cartridge by the device to inject the fluid, gas or other agent into another object.