Abstract: A hand-held apparatus is provided to allow a user to easily apply the necessary force required to install or remove caps into or from a vial or test tube. The device includes a handle member that is ergonomically shaped to provide a user with maximum comfort and control of a cap while applying pressure to insert caps. The device also includes a coupling portion configured to selectively engage a cap and efficiently disengage a cap. Through this configuration, a user generated force is transferred from the handle member through the coupling portion, and to the cap, thereby causing the cap into an opening of the vial for locking the cap into a sealed and closed position with the vial.