The ProFinisher Sander, No. 503 and 603, from Hutchins Manufacturing assists body shops to do everything they need to prep paint and body work. The No. 503 can be used for de-nibbing or paint prep. Its 3" pad size allows for better fine sanding of small or hard-to-reach areas. A more aggressive 3" sander, the No. 603, can be used for shaping and feather-edging bumpers, doorjambs and any small hard-to-reach area.