The Tread collection uses a chain-like pattern which is acid-etched on the barrel. The tactile feel provides a nice level of grip. The Sparkle and Flare are vibrant colors and the all matte black is named appropriately, Flint. Loaded with your favorite rollerball refill and packaged in a traditional Retro display tube. The rollerball can easily convert to a ball pen with a refill change to any Standard Parker Style refill. Color and point sizes choices abound.