LAuman, The Vanguard part # is 79513, Grove pin (pkg 10) which corresponds to APS’s part number. I have used both the pins and pop rivets and prefer the pins. Not that they hold any better, but that you just do not see them without a close look. Pop rivets look ugly but are much more accessible (local hardware/big box store) and require a special tool to install. And you need to wrap the bottom end with tape over the rivets to protect the mast well. With both, you need a drill for the pilot hole, but just need a hammer (or rock, piece of metal, etc.) to drive the pin flush with the surface of the mast. If you have fat fingers (like me), maybe a pair of needle nose pliers (or piece of cardboard) to hold the pin until you get it started. I have always used just two of either (one on each side, 180 degrees apart), a little 3M Marine Silicon to help seal the joint, and have yet to have a cap come off and yes, I do sail when others wont because of higher winds (over 20) and waves with whitecaps. The most fun, but tiring and you “gotta know your limits”.