Fits my Losmandy HD tripod perfectly. The Losmandy HD tripod + AP Adapter Plate + AP Mach1 makes a great combination.
Like other Astro Physics products, this is no different. High quality and precision fit.. When mounting an Astro Physics mount such as the 1100GTO , to the Losmand HD tripod, this adapter is an absolute must. It slips into the Losmandy tripod perfectly and the bolt holes align perfectly as well. The adapter also comes with the necessary mounting hardware. Very thick aluminum with a flat very stable surface on which to mount your other required adapter. This is the high quality adapter you've been looking for.