4 Felt/Tufts University Composite Instrument 4 Felt/Tufts University Composite Instrument CI6056 Reverse double-end blades with ideal width and length for initial placement and carving of composite. 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.