Good quality blades: The blades are made of high-speed hardened steel, sharp, the blades move smoothly, making them powerful and wear-resistant. The blades move smoothly. The lifespan of these blades is 80% longer than normal blades. Practical manual deburrer: Handy little deburrer, convenient to use. The deburrer lies well in the hand and requires little force to use. It's quite light but just sturdy enough. It can be flexibly rotated 360 degrees and easy to deburr. Easy to Use: The tie blade is very smooth to rotate and the changing mechanism is convenient. Replacement blades can be put into the deburring tool by yourself, very convenient to carry. Multi-Function Hand Engraver: Designed for use ranging from DIY projects to applications professional industrial companies. Works on metal, 3D printers, plastic, PVC and many other surfaces. Note: The data is all manually measured, please allow 1-3cm error due to difference in light and display, there may be some color differences, please refer to the actual item received.