It's designed for cutting aluminium board/stick which the thickness less than 1/3 diameter of saw blade and also can be used to cut plastic steel.

Tooth model: TCG,FT
The specification:
Diameter :110mm-500mm(4"-20")
Body thickness: 1.2-3.0mm
Cutting wide:1.8-3.8mm
Hole dimater :20,20/25.4,25.4/30mm
Tooth number :20T,30T,40T,60T,80T,100T,120T