an external fixation assembly for bone fusion or separation is disclosed . the assembly includes a fracture fusion tube , with a bracket slidably engaged thereon . the assembly further includes a collet clamp connected to the bracket , with a ball collet rotatably seated within the clamp , the ball collet having an aperture for receiving a bone bin therethrough and perforations for a compression engagement with a bone pin . the assembly uses a single screw for threadably engaging the ball collet , the clamp and the bracket such that the position of the bone pin , ball collet and bracket are all fixed .