I remember a buzzbait like that. Had a flat head. Could keep arm bent out and it was regular buzzer. Bend in and the blade would hit the lead head, making noise. The ones I had had a small groove where the blade swept through.Broke the arm on it last year. Served me well for 20 yrs when I used it….96 Eyra/12 Mercury 175 Pro XS with 2015 single axle trailer2017 Victory Gunner