Progrip 6" Flex Drywall Joint Taping Knife Is Part Of Warner's Premium Professional Line Of Putty Knives And Scrapers. All Progrip Tools Come In Red For A Stiff Blade, Blue For A Flexible Blade, Yellow For A Fully Flexible Blade. Flex Blade That Works Great With Heavier Spackles And Compounds, Full Tang Blade To Prevent Blade Breakage. Tapered Handle Design Making The Tool Easier To Clean After Usage.