A PME sugarcraft knife and ribbon-insertion blade (PME7), 151 mm (5.9"). Official spec table: hard-coated steel blades and an aluminum handle. Official uses: cutting delicate patterns and precise lines in sugar paste (rolled fondant), flower/gum paste, marzipan, or craft clays. Ribbon-insertion blade twists in; spare blades are sold separately. Clean with a damp cloth. 10-year PME warranty (conditions apply). Specs from PME's Modelling Tools - Sugarcraft Knife & Ribbon Insertion Blade page.
The paste knife. One end cuts; the other opens a ribbon slot.