The 90 degree weld on d-ring mount measures 3.75 inch on the long flat base and 1.75 inch on the shorter base. The d-ring mount is CNC Laser Cut from 3/4 inch thick high strength steel plate. The through hole is 1 inch. The part requires welding to install. The weld on d-ring mount is perfect for adding a recovery point to bumpers, tube chassis, and more.