Magnetic fly patch that can be attached to the brim of a cap or hat.Handy fly patch for carrying a few flies to be used when you&';re not wearing a fishing vest or pack.It is also ideal for temporary storage for flies that have been used in salt water when you do not want to store them into the fly box or fly patch immediately after the use.Convenient for temporarily stocking flies during changing multiple flies in rotation. Also suitable for drying wet flies.Powerful neodymium magnet been used.Size: 42mm(1-21/32inch)