The Modelcraft Ceramic Craft Knife is ideal for use with card, paper, film, thin foam, acetate and balsa. The unique knife will help you achieve precise cuts for a range of tasks. The fixed ceramic blade has increased safety, will not rust, is non-sparking, non-conductive and will last ten times longer than traditional steel blades. It includes a lockable push button with two blade length options: 15mm and 20mm. Perfect for modelling, as well as a range of arts and crafts uses, the craft knife is sure to be an excellent addition to your tool collection. Size: 9.5 x 2.7 x 1.8cm (3.7 x 1.1 x 0.7 inches) Blade length options: 15mm, 20mmFor use with card, paper, film, thin foam, acetate and balsaIncreased safetyWill not rust Lasts 10 times longer than traditional steel bladesIncludes lockable push buttonDesigned with lanyard holeIdeal for modelling, arts and craftsModelcraft Ceramic Craft Knife. self healing cutting mat