U-FAS - Universal "D" Ring This is a unique fastening mechanism that creates a universal "D " ring on any garment without puncturing the fabric. The U-FAS safely gathers fabric between a precision molded attachment disk and a "Twist and Lock "ring closure on the backside of the garment. The U-FAS provides a stable and secure attachment. Please click on "Click to enlarge image" to see directions on how the U-FAS works!