Abstract: A device for severing selected lengths of so-called masking tape from a supply roll, which device is of the type that, for convenience in use, is attached directly to the roll, and in connection with which there has been obviated any springs or the like that adversely affects the tracking of the device about the roll. Instead, the cutting implement of the within device is pivotally traversable and thus effectively takes up the diminishment in the height of the type by partaking of this degree of movement.