Grinding tool for drill, for grinding edges and surfaces

I use 50 mm for 100 mm sanding rolls and 38 mm for 115 mm sanding rolls

https://www.aliexpress.com/item/1005003199143321.html?spm=a2g0o.productlist.main.21.6972afe2oHBngf&algo_pvid=4fdff2d7-65cd-48ee-86b6-0709ffc1b096&algo_exp_id=4fdff2d7-65cd-48ee-86b6-0709ffc1b096-10&pdp_npi=4%40dis%21CZK%21149.87%21149.87%21%21%216.26%216.26%21%40211b813f17089627347583402ef328%2112000024875677703%21sea%21CZ%211628950108%21&curPageLogUid=nUoCQ3RJ9DZN&utparam-url=scene%3Asearch%7Cquery_from%3A

for 38 mm is need M8x55 mm screw, for 50 mm is need M5x65 mm screw