The Wartenberg Pinwheel is a device for testing the elasticity of the skin by applying firm pressure to specific areas. It looks like an innocuous, butterfly-shaped pinwheel with veins on its face. To say that this pinwheel is painful is an understatement – it is designed as an instrument that could produce a physical reaction to the pain threshold.

With an 18 cm length on one side and 10 cm on the other, it makes it ideal for large muscles and deep tissues