Williams Probe Williams Probe PW7 Single-ended, color-coded probe. Ergonomic, Satin Steel™ Colours™ handle. Williams. SKU Handle PW7 #7 Satin Steel™ Colours™ PW6 #6 Satin Steel™ PW #30 Round PW8 #8 ResinEight™ Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.