The outer diameter is 94 mm. There are two 5mm holes to grip it with a ring tool. There are also pockets for metal plates to help lift the disc if the ring tool has embedded magnets. Three stl files are provided with center holes of 13 mm, 25 mm and 40 mm diameter. The FreeCad file is also attached in case you want to adapt the disk to your needs.
The author marked this model as their own original creation.