Special trowel, 4x3 mm, no. 11661

Special trowel,   4 x 3 mm, square notches

For uncoupling mats

Special trowel for embedding uncoupling mats (for example Schlüter®-DITRA).
The decisive factor  for a good embedding is the size of the notches.  If they are too big there is almost no way to get the mats evenly embedded  and if the notches are too small the membrane will be insufficiently embedded. 
These special Karl Dahm® trowels will do the job!  You will achieve best possible embedding  while using less adhesive.

Size:  4 x 3 mm, square notch