Ideal for the reel winding of the main line.A holder ensuring ease of the reel winding of a new main line.Allowing vertical and horizontal mounting as desired. Shaft diameter: 8 mm.Maximum installation width: 60 mm 1) Fix the holder to an appropriate structure, such as a desk.2) Set the spring so as to brake the spool.(Compressing the spring will brake it well.)3) Wind the line on the reel.