Check the listing for details. WORKPRO 100-PC Snap-off Blades 18mm Utility Knife & Box Cutter Replacement Blade. Color: Red+Blue, Condition: New. Listed at 22.99 USD. Description: 100PCS Replacement Blade: The package comes with 100 pcs 18mm replacement razor sharp blades. No need always rush to the store to buy the replacement anymore, just pick the fresh one you want.Strong Rust Resistant & Super Sharp Edge: A razor-sharp acute cutting angle blade that integrates well-built and durable SK5 steel, black coating and multi-step sharpening to produce exceptionally smooth and fine cutting performance.Lastest Storage Ideas: Each of the 10 plastic cases in the subpackage contains 10 blades and is light and small enough to carry when you are doing the outside work. You won’t blame yourself for forgetting to take the blades. The hang hole of the blade box makes it can be hung on your workbench, which is space-saving.Wide Application: WORKPRO replacement blades make your life more convenient. Multi-functional replacement blades are ideal for craft hobbyists and artists to use at work, home or school like cutting fabric, shrink-wrap, leather, wallpaper, vinyl, altering, sewing, tailoring and raw materials.Convenient to Use: Designed with a 4-inch (100mm) length and 8 cutting edges per blade, these 18mm snap-off blades are easy to use and suitable for long-term use. Snap the old section off with a knife cap, wearing gloves for security.