Replacement for comb block (split ring). This will work with PFS stocks with 7/16” diameter top rods. It will not work with the PFS plastic plate comb, it only works with the Ultimate Fit Comb bracket system. With fasteners on both top and bottom it lacks the height difference of a factory block. That makes it only suitable for high rib guns. I made a couple of these for myself and a couple of friends that bought used PFS stocks with damaged comb blocks. It is threaded on both sides for bracket placement. It’s best to install with an inch pound torque wrench to ensure even distribution on the fasteners. $50.00 shipped to the lower 48 payment by money order Goes to the first “I will take it” posted under the add