Diesel Injector-Seat Cleaning Kit (Stainless Steel) IPA 8090S For most diesel applications, bushes are specially engineered to fit injector seats Removes rust, carbon and other debris from seats and cups without damage High quality helix, two stage and bore brushes are ideal for many automotive and industrial uses Driver handle and rigid extension feature a spring-loaded, quick-lock coupler Flexible extension features a flush locking screw for access into hard to reach areas Helix Brushes (1.375&#034;, 1.1875&#034;, 1.160&#034; and .990&#034;) Two-Stage Brushes (1&#034;, .750&#034;, and .500&#034;) Bore Brushes (8mm, 10mm, 12mm, 15mm, 17mm, and 19mm)