Bimini top quick release pins

[JaCrispy]

Under way, the bimini top pins tend to work their way out. Was looking into something more secure besides the bolts I'm using now.

Any suggestions? Looking at these: http://i.ebayimg.com/images/g/QRgAAOSwM4xXbB1V/s-l1600.jpg

 

[Alumarine]

Those work fine.
Also the type with the spring loaded ball at the end work for me.
http://www.iboats.com/Taco-Marine-Q...1871692--session_id.010583070--view_id.685965