These are our custom buckle on slobber straps..  for mecate reins ! I’m using 8-10 oz burgundy brown latigo leather made from US Steerhides. The buckles are shiny nickel plated.  They are attached with Chicago screws making it possible to replace the buckles if desired.. they measure 6” long and hole for your mecate is 9/16” .. Look in my eBay store for mecates that would work great with these!  Made from my shop in oregon, just for you !