A portable scale includes a spring member coupling a grip device to a weighing device, to allow the grip device to be moved relative to the weighing device against the spring member to weigh objects. The grip device includes a fixed jaw having a hook member for attaching to the objects, and a pivotal jaw pivotally attached to the fixed jaw and having a hook member movable toward the hook member of the fixed jaw, to grip the objects, and to allow the objects to be solidly attached to the grip device before conducting a weighing operation. A latch may be used to latch the pivotal jaw to the fixed jaw.