Abstract: A manually operated and locked conduit length adjuster system comprising a cable adapted to be connected at one end to an actuator and at the other end to a device to be actuated, a first length of conduit adapted to be attached at one end to a fixed point and at the other end to a manually locked conduit length adjuster. The manually locked conduit length adjuster includes a plastic body adapted to be attached to the first length of conduit and having an opening through which a plastic slider extends. The slider includes annular teeth and the plastic body includes a locking member integrally hinged to the plastic body and adapted to be moved into position to cause teeth thereon to engage the teeth on the slider. The locking member has other portions thereof which engage the body for locking the locking member in position.