1. made of YG8 Carbide
5408A (Triangle model): 74*74*74mm , 5408B (Half circle model): 65mm
3. Triangle blade main used for grinding concrete,move grout of tile back. half circle blade used for moving grout in the gap of both tile.
4. Universal shank,quick change design,can be fit for 98% brands and model machines in market as bosch,fein,dremel,makita,dewalt,and so on. (please note: this blade cann't fit for starlock system machines)