Designed to be not only stronger, but safer, our range of Hemmed Stud and Track sections help reduce handling injuries on site. The hemmed return lip. Read reviews, compare customer ratings, see screenshots, and learn more about Stud or Dud. Download Stud or Dud and enjoy it on your iPhone, iPad, and. Stud or Dud helps you separate the Studs from the Duds. Free background information. Get it for free on iPhone.