The Daystar D-Ring Isolators install on any standard 3/4 Inch shackle. They simply snap into place and can be installed or removed in seconds. Polyurethane acts as an isolator for the shackle and prevents the shackle from tapping against a bumper or any other recovery point when the vehicle is in motion.The Isolator also protects your bumpers finish from scratches caused by D-Ring contact. Daystar D-Ring Isolators are available in Black, Red, Blue, Orange, Purple, White, Yellow, Fluorescent Orange, Fluorescent Green, and Fluorescent Pink and help add some color to any off-road vehicle.