HMM Rule/One BlackTHE PEN, THE RULER, THE BOOKMARK IN ONE The HMM Rule One is a beautifully engineered multi tool that combines a pen, a ruler, and a notebook bookmark in a single sleek aluminium form. Its distinctive droplet shape fits perfectly alongside the pages of your notebook, while interchangeable heads let it adapt to paper, tablet, and on the go use. Finely crafted, light, and a genuine pleasure to use. KEY FEATURES 3 in 1 Tool: Pen, ruler, and notebook