The Professional Diesel Injector-Seat Cleaning Kit features three distinct types of brushes: helix brushes with a specially engineered tip for deep seat cleaning; two-stage brushes for seat and inner seat-hole cleaning; and bore brushes for all bore and tube wall cleaning. The kit, available in brass and stainless steel, includes 13 specialty brushes with 3-inch, 4-inch and 6-inch brush lengths; 6-inch flexible and rigid extensions; a driver handle; and 400 assorted Swab-Eez.