This new, lighter Class III Approved hoist weigher attachment fits most types of hoists that have the coathanger type of sling support. The hooks are approximately 39 cms. apart. Simple to operate - lift the patient and weigh. Body Mass Index function. Safety clips to secure sling straps. Hold of weight feature. Weight of scale 6 Kg. Powered by batteries or supplied mains adaptor. Capacity 200 Kg.