PB 3300564 Squeegee Knob for Minuteman Power Boss Power Sweepers and Scrubbers. A brass inserted 4-prong plastic twist knob. Commonly found on the outer edges of the curved rear squeegee assemblies on Minuteman Power Boss floor scrubbers and sweeper/scrubbers. This knob secures the outer edge of the squeegee retaining straps. Found on many popular Power Boss and Minuteman models: TSS/82, Core 50, Monitor Series (82, 90), Commander Series (C82, T82, C90, T90), and others. Please refer to your parts manual for the proper application. Commonly two are required per unit. Priced Each. Replaces Minuteman Power Boss 3300564. Our Part Number PB 3300564