"This assortment of specialty brushes, drivers, extensions and SWAB-EEZ® is ideal for removing carbon, rust, and other debris from injector seats, bores, and cups. Three distinct types of brushes include: Helix Brushes for deep seat cleaning, Two-Stage Brushes for seat and inner seat hole cleaning, and Bore Brushes for bore and tube wall cleaning. The ¼"" drive hex shaft allows for quick interchange of brushes, drivers, extensions, and the use of LOW SPEED drills. Also included are 400 assorted, low-lint, flexible, industrial-grade SWAB-EEZ® ranging from 5mm to 20mm in diameter."