In embodiments of the invention, there is provided an external fixation system comprising a first plate and a second plate and connectors therebetween. Some or all of the connectors may be adjustable in length or angular position or both. Angular adjustment may comprise a fixed amount of friction and an adjustable amount of friction, and the permitted angular deflection can vary around the perimeter of the angular joint. An adjustable-length connector may comprise a tiltable nut that can either engage or not engage a threaded rod to provide both coarse adjustment and fine adjustment. Tactile or audible feedback may be provided.Other accessories may include: provisional alignment clamps to position parts of the patient's body; a K-wire alignment guide; a K-wire support post; a universal fixation bolt; a plurality of half-pins that can be used with a common support post or block; and a resilient retention device.