Easily strips, cleans and removes old floor and wall tile grout. The blade's abrasive edge is made from tungsten carbide grits. Tungsten carbide is a chemical compund that staysshaprer, uo tp 20 times longer than most other materials and is therefore ideal for grout removal. The handle features a blade storage compartment. Use round end to smooth the joint of grout. Handle fits 5 extra blades, keeping them within easy access when you need them quickly.

Here is a demo video for you: http://www.youtube.com/watch?v=OBiEHW-jfPE