The Vitrex GRA006 Grout Rake has a tungsten carbide grit-edged blade for longer life. Its guide wheel helps prevent damage to tiles.

To use:
Rake out grout lines to half the tile depth.
Use a firm, even pulling action, avoiding blade contact with the tile surface.
Remove debris and wipe the tile before grouting.

Additional blades may be added for removing thicker grout lines.