Each package contains two snap tabs and four buttons, enough for one window.

Unsnap the canvas straps on the window.  Snap a button on the two snap studs on the outside of the window. 

Snap the remaining two snap buttons on the snap sockets on the inside of the window.  They are used later to store the straps when the windows are closed. 

Snap the snap tab to the end of the canvas strap.

Roll the window up and slip the snap tabs over the buttons on the outside of the window.  The window is now secured in seconds.

The snap tabs and buttons remain in place so you will never need to snap again.

To store straps on the inside of the boat, simply slide the snap tab over the button.