Ystudio Classic Revolve Ballpoint Pen - Brass SlimAbout Ystudio Classic Revolve Ballpoint Pen Brass Slim The Ystudio Classic Revolve Ballpoint Pen is a practical writing instrument yet is completely aesthetically pleasing. The warm untreated golden brass body, smooth writing style and pleasing solidity ensures that like all Ystudio products, this pen will last a lifetime. This pen is manufactured from natural, untreated brass and will develop its own unique patina over time.