This is a rOtring Eternium Core Rollerball pen. When I worked for a company that designs and manufactures turf maintenance, snow removal and irrigation system supplies, I gave a vendor a company hat and shirt for this orange and gray pen. It looks like it goes with heavy machinery and hard hats. It's thick, but it's also super light. And, the really fun part is that the orange section on the barrel has four holes to reveal the amount of ink left in the chamber.
I give this pen a 5 PI Rating out of five.