Steel base for Browning BAR or Benelli Argo. Distance between the two inner holes: 8 cm. Distance between the two outer holes: 10.5 cm. Internal distance between the two pairs of holes: 1.25 cm. Total length: 12.7 cm. Equipped with 4 fixing screws. Distance between the grooves: 5 mm. Gross weight: 110 grams.