3.9 inches (100 mm) width is 0.8 inches (20 mm) thick, which is larger than other sizes. If you are using it between the middle wall columns, the bracket fixing screws will not protrude on the back and will not fall off dirt wall or gypsum board. (Please prepare a 0.8 inch (20 mm) long screw. )
ベースプレートの壁固定には必ずFM割れ止めビス3.5×65㎜をお使いください。