PLATINUM (Platinum Pen) PRO-USE 171 Drafting Pencil, Matte Black, MSDA-2500, 0.3mm The "PRO-USE 171" is popular for its "Schnork System," which allows users to adjust the writing feel to their liking. The matte black finish emphasizes the solid form, creating a cool appearance that differs from the silver model. The matte black knurling on the grip and the rotating knob on the taper (tip) further enhance the tool-like and gadget-like feel. This model is a matte black version that pays attention to detail, even down to the lead pipe at the tip.