Based on this product's specifications, here are some alternatives and similar models
V-groove bit Dremel 640
Summary description:
The Dremel 640 V-groove bit is designed for precise engraving and cutting. With a diameter of 6.4 mm and a shank diameter of 3.2 mm, it is ideal for creating V-shaped grooves in various materials. This bit is perfect for detailed work on wood, plastic, and soft metals, providing clean edges and professional results.