Reduces Hand Fatigue: The scalpel blade is made of aluminum and engraved with a diamond pattern. It effectively reduces hand fatigue caused by long working hours, providing more precision and control. Non-slip, you don't have to worry about sweating. (weight per piece: 20 G. lightweight aluminum won't stress you.) Gentle to use: The blade is made of high quality carbon steel to ensure smooth cutting and engraving of DIY objects. Still sharp after prolonged use. To increase the hardness, it is coated with aluminum oxide. You just need to rotate the textured part of the modeling scalpel set to change the blade, which can be done in five seconds. Convenient to Carry: Please tighten the screws before use, use the protective cover on the back cover to avoid unnecessary cutting. Please cover the box to prevent loss of blades. Easy to store and transport. Versatile: The precision cutter is perfect for precision cutting patterns, decorative paper, artwork, cardboard, wallpaper, foil, plastic, wood, fabric, etc. Carving scalpel is perfect for artists, designers and craft enthusiasts to carve artworks, model sculptures and wood carvings. Note: Data is manual measurement , please allow 1-56cm error, due to the light and screen differences, there will be a certain color difference, the specific received in kind prevail.