Simpson Latch & Link Harness 3" Double Pull down SFI 16.1Patent Pending Double Pull Down Latch and Link buckles provide the best in safety and comfort with an all new buckle with integrated Clam Shell style adjusters molded into the buckles. These are the smoothest adjusting lap belts in the industry. Paired with our forged end links for the shoulders and sub belts, this buckle package is the smallest and strongest in the industry. You will appreciate the way the shoulder end links position the shoulder