Vintage Coarse Knurl:
-1.188 in. intended for deeper bodied guitars such as the Gibson Les Paul Standard or Gibson 335 model
-0.750 in. intended for thinner body style instruments such as those built by PRS and models like the Gibson SG, or Les Paul Junior
Fine Modern Knurl:
-1.250 in. made to fit guitars with a deeper body depth for more strength in mounting and utilizes standard US internal thread.
-0.875 in. standard stop bar tailpiece anchor bushing fits most guitars