Tips: To avoid scratching your fingers, these blades are wrapped in a rubber protector. Pull them out of the protector during use. These knife blades must be adjusted manually depending on different cutting materials. Compatibility: These replacement blades are fully compatible with Air 2/Air 3/Maker/Expression, suitable for cutting machines. 3 Sizes cutting effect: There are 3 different sizes of blades for cutting different materials, 30-degree blades are used for thin materials: window film, film, rice paper, 45-degree blades are for the standard blade, suitable for paper, vinyl, sticker, adhesive foil, 60-degree blades suitable for deep materials: fabric, cork, magnet and leather, thick cardboard. Cutting & Smooth: Made of quality tungsten steel, these replacement blades are durable and do not rust easily, you can cut your project smoothly and cut cleanly without dragging and without skipped points. Product name: Replacement for die-cutting. Size: 23.5x2mm color: as shown Material: tungsten steel Package contents: 10 x 30 degree fine point cutter replacement blades (yellow cap) 30 x 45 degree standard blades (red cap) 10 x 60 degree (blue cap) Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be a little different from the real thing. The allowed measurement error is +/- 1-3 cm.