The stanley fat max heavy duty saws have bi material handles which are screwed and ultrasonically welded for comfort and security and allow cutting at 90 and 45 the teeth are precision set to generate clearance of kerf for the blade to cut on both the forward and back stroke increasing cutting efficiency by 30 these 3 sided teeth are precision ground to offer razor sharp cutting edges at every stage of the stroke they are induction hardened to stay sharper for longer 7 tpi