lead filled head, 10 oz. head, 1″ head?Gerzog Mallet is a highly versatile instrument made for use in a variety of surgical settings. The head of this mallet is filled with lead which makes it durable and high performing. Additionally it is 10 oz and has a 1″ diameter. The entire mallet measures 7.5″ long. diam., 7-1/2″ (19.0 cm)