1. A device for segmenting a bone two operations, the device comprising: a support block comprising one or more recesses; a guide block in slideable connection with the support block, the guide block including one or more holes, wherein, in use, a first hole on the guide block is aligned with a first recess on the support block such that the guide block is able to be positioned to a predetermined length to perform a second operation; a wedge connected to the guide block, wherein the wedge defines an opening for receiving a cutter; and a temporary fixing means for removably connecting the guide block against the support block.