A spinal correction system comprising: at least one bridge member defining a longitudinal axis and extending between a first end and a second end, the first end including a first inner surface defining a first cavity and the second end including a collar having a second inner surface defining a second cavity, the second cavity being movable relative to the bridge member in at least one orientation, the second end comprising an interior surface defining an elongated cavity, wherein the interior surface includes a plurality of projections defining a plurality of recesses therebetween; at least one first extender defining a first outer surface configured for engagement with the first inner surface; and at least one second extender defining a second outer surface configured for engagement with the second inner surface, wherein the at least one bridge member is disposable between a first configuration and a second configuration, wherein the bridge member is disposed in the first configuration when no forces are applied to it, and is disposed in the second configuration when forces (F1, F2) are applied to it to create a moment on the bridge member, thereby moving the second cavity in the at least one orientation to a position in which the first inner surface is forcibly disposable in a fixed engagement with the first outer surface and the interior surface is forcibly disposed in a fixed engagement with at least a portion of the collar, the system further comprising at least one handle (46, 48) attached with the at least one bridge member to apply the moment to the bridge member to dispose the bridge member in the second configuration, wherein in the first configuration the collar is freely translatable within the elongated cavity, and in the second configuration the collar is disposed in one of the plurality of recesses. at least one bridge member defining a longitudinal axis and extending between a first end and a second end, the first end including a first inner surface defining a first cavity and the second end including a collar having a second inner surface defining a second cavity, the second cavity being movable relative to the bridge member in at least one orientation, the second end comprising an interior surface defining an elongated cavity, wherein the interior surface includes a plurality of projections defining a plurality of recesses therebetween; at least one first extender defining a first outer surface configured for engagement with the first inner surface; and at least one second extender defining a second outer surface configured for engagement with the second inner surface, wherein the at least one bridge member is disposable between a first configuration and a second configuration, wherein the bridge member is disposed in the first configuration when no forces are applied to it, and is disposed in the second configuration when forces (F1, F2) are applied to it to create a moment on the bridge member, thereby moving the second cavity in the at least one orientation to a position in which the first inner surface is forcibly disposable in a fixed engagement with the first outer surface and the interior surface is forcibly disposed in a fixed engagement with at least a portion of the collar, the system further comprising at least one handle (46, 48) attached with the at least one bridge member to apply the moment to the bridge member to dispose the bridge member in the second configuration, wherein in the first configuration the collar is freely translatable within the elongated cavity, and in the second configuration the collar is disposed in one of the plurality of recesses.