First popularized and named at National Hospital for Nervous Diseases in Queen Square, London. The Queen Square with Rattan Handle is most like the queen square with bamboo handle. Length -15” , weight of hammer - 4oz, diameter of head - 2”, rattan handle with sensory tip with red vinyl cover, 2nd rattan handle with hex key included, and presentation box. Total weight: 11 oz Product ID. NHP-1 (36cm)