Tasks are essentially sedentary, with some physical effort, i.e., frequent walking, standing; some lifting and carrying of moderate weight (5-20 pounds); or minimal dexterity in the use of fingers, limbs, or body in the operation of vehicles, office, shop, or hand tools in which manipulative skills and hand-eye coordination are important ingredients of safe and/or productive operations. Tasks involve the regular, and at times sustained, performance of heavier physical tasks such as walking over rough or uneven surfaces, bending, stooping, working in confined spaces, and lifting or carrying moderately heavy (20-50 pounds) items and occasionally very heavy (100 pounds or over) items.