Product description RAZORSAFE BLADE ECOSYSTEM NEVER SHARPEN YOUR KNIFE AGAIN Our patented RazorSafe System has grown and become a simplified blade compatibility system to easily ensure you are purchasing the correct blade sizes for your knife. SO MANY CHOICES WHEN IT COMES TO RAZORSAFE CHOICE OF BLADE FINISH RazorSafe blades are available in black oxide or tumbled stainless steel to compliment the looks of your knife. DIFFERENT EDGE FINISHES Lets face it, not all cutting tasks require the same blade. Why not have the choice between a plain edge or 50% serrated edge for those tough jobs. VARIETY OF SIZES RazorSafe blades are available in 2.2", 2.5", 3.0", 3.5" and 5.0" blade lengths and are compatible with corresponding blade holders and handles. NUMEROUS BLADE PROFILE STYLES Drop point blade is the most common, but having the ability to change to a work, hook or even fillet blade at the push of a button changes the game. Replaceable Blade Compatibility Chart EXPLORE MORE BLADES 3.5 inch (350) BLADES 2.2 inch (220) BLADES 2.5 inch (250) BLADES 3.0 inch (300) BLADES 3.0 inch (301) BLADES 5 inch (500) BLADES Customer Reviews 4.8 out of 5 stars 5,699 4.8 out of 5 stars 146 4.8 out of 5 stars 107 4.8 out of 5 stars 1,989 4.7 out of 5 stars 298 4.9 out of 5 stars 1,303 Price $13.99 $ 13 . The video guides you through product setup. The video compares multiple products. The video shows the product being unpacked. aplus content video How do I know which blades to purchase? Look on the backside of the blade holder and reference the numeric indicator. 220=2.2", 250=2.5", 300 & 301=3.0", 350=3.5", 500=5.0" What material are the RazorSafe blades constructed from? All Outdoor Edge RazorSafe blades are made from Japanese 420J2 stainless steel that has been heat treated and hand finis