Leister GROOVY gouging tool is a lightweight, handy tool for the experienced layer of elastic floor coverings made of PVC or linoleum made by Leister. The leister hand groover (Leister Groovy) depth is to be tailored to the material to be welded. Rotating the adjustment wheel counterclockwise yields a deeper groove (+), and rotating the adjustment wheel clockwise yields a groove of lesser depth (-). Each revolution results in a change of depth of around 0.35 mm. If the blade holder is flush with the housing, then the blade will achieve a cutting depth of around 0.5 mm. If the blade holder (6) is completely extended, then the blade will achieve a maximum cutting depth of around 3.0 mm.