This roller Burnishing tool listing includes one piece of 47MM roller burnishing tool. It's adjustable. Each grid is 0.0025MM.  Total 25 grid. So the tool can burnish hole from 47MM to 47.0625MM. 

For 47MM through hole with 50MM depth. 

Max. hardness HRC 30.

With MT3# shank. Or other taper/straight shank as customer prefers.

The burnishing tool's roller is adjustable. By using this tool, the hole's surface can be rolled to be like mirror. The precision of the hole can't be changed after its surface rolled. Finish (Ra) should be at least 1.6 prior to using the burnish tool to achieve a mirror polish(Ra0.2)

Have sales in many countries. 

The shank can be made MT2, MT3# or straight.