a device for clamping fixation elements , which have been inserted into bone , for manipulating fragments of a fractured bone . the device incorporating a hollow body with a cavity having a wall , a clamping body moveable within the cavity between a first position and a second position , and a clamping device operably connected to the clamping body for moving the clamping body between the first position and the second position . the device being sized and configured so that when the clamping body is in the first position a free end of the fixation element may be positioned between the clamping body and the wall of the cavity . once the fixation element is properly positioned within the cavity , the clamping device may be used to move the clamping body into the cavity , thereby wedging the fixation element between the clamping body and the wall of the cavity . a bone fragment may then be manipulated using the device .