An adjustable seat belt system having a plurality of anchor fittings where one or more anchoring slide block fittings comprise a gear mounted to the anchoring slide block for positioning the anchoring slide block along a track by a manual rotation device or electric motor for rotating the gear interacting with a rack located on the track. The anchoring slide block fitting can also be repositioned by rotating a screw which repositions the anchor. A double-pole double-throw switch is activated to energize the motor to move the block to a selected position.