SMALL Universal Mounting Platform / Clamp - Vixen Compatible - ALUMINIUM with BRASS PRESSION BLOCK
See image below for sizes, wholes and threads of this universal telescope mounting clamp / platform.
Whole sizes relate to the smaller diameter of each whole.
I.e. the 6.5mm whole will allow a M6 bolt and the head of a Socket Head Cap screw will fit inside the wider part of the whole...
It is compatible with Vixen style telescope mounting plates and bars.
Click on the image below to see it in higher resolution: