Microdermals or Dermal Anchors and Skin Divers have a foot/base, a post and a top. They are used in the dermal anchor piercing or microdermal, which is a form of surface piercing. The foot/base is what keeps the jewellery in the piercing and it is fixed under the skin. A small section of the post is above the skin and has an internal threading inside the post The dermal anchor top has a protruding screw under it, which can be screwed into the threading of the post. Once a dermal anchor base is fitted it remains in the skin so at Shop@Tattooed Lady we only sell dermal anchor and microdermal tops as the fitting of the base should only be carried out by a qualified piercer. For help with body jewellery sizing please read our sizing guide. For more information please read our Body Jewellery Guide section about microdermals.