These Stanley Snap-Off Blades have a straight cutting edge and fit Stanley snap-off knives. Available Sizes: 9mm, 18mm and 25mm. The 25mm blades are 1mm thick and have been specifically designed for intensive use. These Stanley Snap-Off Blades are 25mm and have 6 snap-off segments. They are specially designed for intensive use and are 1mm thick. They are suitable for use with the following 25mm snap-off knives: STA010820 and STA010486. Pack of 10.