The Queen Square reflex hammer was designed for use at the National Hospital for Nervous Diseases (now the National Hospital for Neurology and Neurosurgery) in Queen Square, London.
It was originally made with a bamboo or cane handle of varying length, of average 25 to 40 centimetres, attached to a 5 centimetre metal disk with a plastic bumper.
The Queen Square hammer is also now made with plastic molds, and often has a sharp tapered end to allow for testing of plantar reflexes though this is no longer recommended due to tightened infection control. It is the reflex hammer of choice of the UK neurologist.