Retractable Snap-Off Trimming Knife 18mm - Faithfull FAITKRS9, The Faithfull Snap-Off Knives are a popular alternative to standard trimming knives because of the advantage of a replaceable, continuous blade, from which scored segments can be snapped off to expose a new cutting edge. The removable blade snapping tool provides a means of safely and quickly detaching used blade segments. Three spare strips of blades are located within the integral blade storage system. The knives have a comfortable non-slip grip and a thumbscrew safety blade lock.1 x Faithfull Trimming Knife - Retractable Snap-Off 9mm Faithfull FAITKRS9 Retractable Snap-Off Trimming Knife 9mm