Devices, systems, and methods for driving an implant into bone to a predetermined depth are described herein. In one embodiment, a medical driver tool is provided that includes a housing having a proximal end configured to receive an impacting force, an elongate shaft extending distally from the housing and having a distal tip configured to drive an implant into bone, and a release mechanism coupled between the housing and the elongate shaft. The release mechanism can have an engaged position in which the elongate shaft is axially immovable relative to the housing and a disengaged position in which the elongate shaft is axially movable relative to the housing. The release mechanism can be configured to move from the engaged position to the disengaged position in response to a force applied to move at least a portion of the release mechanism proximally relative to the housing.
