These blades fit our Precision Silicone Hose Cutting Machine, Part No. 3158-500. The surgical-quality steel holds an edge much longer than the average shop knife. Pack of 10 blades. (The complete cutting tool kit includes one pack of blades when new.)
Note sure if it's time for a new blade? You should change the blade when cutting begins to require more effort. If you have to grip the hose so hard that you distort it as you turn, you are overdue for a new blade.