Sealife Underwater Housing Stainless Steel 1/4-20 Hinged D-Ring Sealife Stainless Steel 1/4-20 Hinged D-Ring Screws into Any Standard Tripod Mount Construction: Corrosion Resistant 316-Stainless Steel D-Ring Hinge Feature: Allows Collapse of D-Ring Flush when Not in Use Great Save-A-Dive-Kit Item