Can anyone help me decide which part to use?

for my Major project i decided to create a fingerprint operated cabinet lock, i have made a model sort of like this one but i have replaced the handle with a servo in the middle. the servo’s i have used have been too weak to move all the part well, does anyone have any suggestions on a stronger servo to use?
this will likely be a full height door. any help would be greatly appreciated.

Hi Samantha,

This servo is capable of providing 5KG of torque. That should be enough to operate a door handle!