Handle to make it possible to use a diamond grinding disk to manual sand an area. In my case I used it to remove high spots on a wall before applying waterproofing. 

Fits the standard size 22.23mm/ 7/8" hole - 

Made so that a 10mm nut can be inserted into the print during the print. Make a color change at 36.0mm height and insert the nut. The print is a bit tight so it is recommended to heat the nut before pressing it in. It should be able to melt its way into the hole. I would estimate that the nut should be around 200-240 celsius. 

Use a big washer and a M10 bolt to bolt the disk onto the handle.