Each of the kits Hydorn assembles by hand is a simple contraption designed for a single purpose: people kill themselves with it by encasing their head in a bag of helium, which is lethal in pure form. People like Klonoski, the son of a U.S. district judge and whose funeral was attended by more than a thousand people. The Gladd Group’s estimated annual sales are $98,000. That means Sharlotte Hydorn sells more than 1,600 suicide kits every year.