This is what it looks like:
|Grout Cleaning Tool: Homemade|
You need to drill a hole through the bottom of the scrubber, insert the bolt, put a washer on each side, add the nut to tighten the washers and you are ready to insert the bolt end into your hand-held drill.
Dear One did a GREAT job cleaning the grout in our kitchen tiles. The floor took several days to finish but he did it! What an angel!!!