The Rotring 600 3-in-1 Multipen offers smooth, long-lasting, and precise writing. It features a heavy metal hexagonal barrel with a cylindrical knurled grip, providing a non-slip and comfortable hold for extended writing or doodling sessions. The knurled button can be twisted to select between writing modes. This versatile pen includes a red ballpoint, a black ballpoint, and a 0.5mm mechanical pencil. Refills are available using D1 refills and 0.5mm lead. The pen is primarily black, with a brass housing material, and writes in black, blue, and red. It has a thickness of 0.5mm and weighs 32g. The pack quantity is 3 pieces. The 3-in-1 design allows for quick and easy switching between writing modes. The brass mechanism ensures precision lead advancement, and the fixed lead guidance sleeve prevents breakage while offering an unimpeded view for ruler-based drawing. Its hexagonal barrel promotes fatigue-free writing and drawing and prevents rolling on inclined surfaces. The metal knurled grip ensures the writing instrument stays securely in your hand.