An adjustable length strut (100, 100', 100") for use in an external fixation system, the strut (100, 100', 100") comprising: a generally hollow outer tube extending between a first end and a second end; an inner tube sized to fit within and translate relative to the outer tube, the inner tube extending in a length direction and having a circumferential direction, a plurality of texturized surfaces extending in the length direction of the inner tube, each of the plurality of texturized surfaces of the inner tube being spaced apart from each other in the circumferential direction of the inner tube and each circumferentially adjacent pair of texturized surfaces of the inner tube being separated by a non-texturized surface; and a first adjustment knob coupled to the second end of the outer tube, the first adjustment knob having an interior surface defining a channel, the interior surface extending in a length direction and having a circumferential direction, the inner tube passing through the channel, the interior surface having a plurality of texturized surfaces extending in the length direction of the interior surface, each of the plurality of texturized surfaces of the interior surface being spaced apart from each other in the circumferential direction of the interior surface and each circumferentially adjacent pair of texturized surfaces of the interior surface being separated by a non-texturized surface, the first adjustment knob being rotatable relative to the outer tube and the inner tube between a locked condition and an unlocked condition; wherein (i) in the locked condition, the plurality of texturized surfaces of the inner tube engage the plurality of texturized surfaces of the interior surface of the first adjustment knob to prevent translation of the inner tube relative to the outer tube, and (ii) in the unlocked condition, the plurality of texturized surfaces of the inner tube align with the plurality of non-texturized surfaces of the interior surface of the first adjustment knob to allow translation of the inner tube relative to the outer tube. a generally hollow outer tube extending between a first end and a second end; an inner tube sized to fit within and translate relative to the outer tube, the inner tube extending in a length direction and having a circumferential direction, a plurality of texturized surfaces extending in the length direction of the inner tube, each of the plurality of texturized surfaces of the inner tube being spaced apart from each other in the circumferential direction of the inner tube and each circumferentially adjacent pair of texturized surfaces of the inner tube being separated by a non-texturized surface; and a first adjustment knob coupled to the second end of the outer tube, the first adjustment knob having an interior surface defining a channel, the interior surface extending in a length direction and having a circumferential direction, the inner tube passing through the channel, the interior surface having a plurality of texturized surfaces extending in the length direction of the interior surface, each of the plurality of texturized surfaces of the interior surface being spaced apart from each other in the circumferential direction of the interior surface and each circumferentially adjacent pair of texturized surfaces of the interior surface being separated by a non-texturized surface, the first adjustment knob being rotatable relative to the outer tube and the inner tube between a locked condition and an unlocked condition; wherein (i) in the locked condition, the plurality of texturized surfaces of the inner tube engage the plurality of texturized surfaces of the interior surface of the first adjustment knob to prevent translation of the inner tube relative to the outer tube, and (ii) in the unlocked condition, the plurality of texturized surfaces of the inner tube align with the plurality of non-texturized surfaces of the interior surface of the first adjustment knob to allow translation of the inner tube relative to the outer tube.