Abstract: An installation device for carrying out installation steps on a wall, and a method for exchanging a tool received by the installation apparatus, include an installation apparatus having a drive unit coupled to a tool holder. The tool holder receives a tool that extends away from the tool holder in a tool direction and which tool is driven by the drive unit. The tool holder can assume a locked state and an unlocked state, wherein a tool received by the tool holder can be removed from the tool holder in the unlocked state and is fixed in the tool holder, and therefore cannot be removed, in the locked state. The installation apparatus has an unlocking device controllable by an actuator and the tool holder can be brought from the locked state into the unlocked state by the actuator to release the tool.