The Tom's Studio Lumos Pro is a considered response to one of stationery's most persistent frustrations: the disposable fineliner. A single aluminium body, eleven interchangeable Japanese-made tips, and a refillable cotton wick reservoir that works with any dye-based fountain pen ink — fineliners from 0.1mm to 1.0mm, a brush tip, chisel, bullet, and two writing tips, all in one pen. When the ink runs low, refill it. When a tip wears out, replace just the tip. Nothing goes in the bin that doesn't need to. The Single has one tip and a full-capacity reservoir. The Duo is double-ended — two tips, one at each end, with a reservoir for each, screwing together at the middle to form a full-length pen. Both are available at Laywine's in Matte Black, Ivy, and Midnight — explore the full Tom's Studio range at Laywine's.