The Stanley Snap Off Replacement Blades offer 75% longer life for longer term use, 35% sharper that can easily cut through anything, 20% stronger that you can use even on hard and thick cutting necessities and it has 8 points of blade for convenience This replacement blades fit Stanley 10-218, 10-480, 10-380, 10-280, 10-220, 10-418 and 10-151 snap-off blade knives and most other 18 mm snap-off blade knives Best for general and precision cutting: box cutting, arts and crafts, cardboard, carpet, drywall, rope, vinyl, leather, flooring, and wood Comes with plastic case to protect your blades from harsh elements that can cause corrosion and dull and will keep you safe against accidental cuts