The TWSBI Precision is a handsome looking pen made of brushed aluminum. The TWSBI’s Precision series is a range of all metal pens with hexagonal barrels. The fountain pen, currently available in just this gunmetallish finish feels well made and, being made from metal has ergonomic and robust design. The piston mechanism is smooth and very satisfying to use. The pen holds a good amount of ink and there’s a small ink window so you can see how much ink is left.