The Quartz Castle is the most reasonable American quartz nail on the market. Made by Chris Shuler out of Washington State, he has been doing it for years. The Quartz Castle is an American quartz staple. It’s great as an introductory piece because of it’s price. Some people live by the quartz castle because of its ease of use. These nails will fit both male and female applications in a 90° angle. For 45° please see the Hit-Packs, which are also made by Quartz Castle. They provide an adapter for better fitment.