Long Base Beretta Replacement Comb Adjuster - Break OpenLong Base Beretta Replacement Comb Adjuster Break Open Two part drop in replacement system. No drilling or new holes or screws required. The 4 way adjustable comb system is made from T6061T6 finished in anodized silver or anodized black. Top section is 5 8 x 1 x 4 7 8 with 3 stainless steel flat head hex socket clamping screws that tighten around the 2 3 8 stainless steel adjusting posts located on the base plate. Base plate is 1 4" x 1 x 5 6061T6