A Nose Stud can also often be referred to as a Nostril Stud, Nose Bone or Nose Screw. This type of jewellery is for use in the nostril piercing. A nose stud has a post which has been curved around to fit in the nose more comfortably. It can be made of many different materials such as 316L surgical steel, titanium and 9ct gold. It has a small end ball or gem ball which is usually fixed. It is fitted by pushing it into the piercing whilst twisting it, the shape of the jewellery then holds it in place. 1mm - 1.2mm is the most common gauge for a Nose Stud.