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Derby or hawk / Float

- a flat board usually around 18" square with a projection on its underside which allows it to be hand held, used by plasterers to carry a small amount of the material they are working to the wall face, to which it is smoothed on using a plasterers trowel often referred to simply as a float, sometimes as a dove. A float with a nail in it, used to give a light scratch to provide a key for a finishing coat, is sometimes referred to as a devil float.