THE FLANGES IN THE PHOTO HERE THAT LOOK LIKE A TRIANGULAR BASE ON A RECTANGULAR BASE ABOVE THE BODY OF THIS CIRCULAR SAW ARE NOT PRESENT ON THE PRODUCT I THINK. IT WAS INCREDIBLY DIFFICULT AND TIME TO CUT ABOUT 1/2" OF THE GARAGE WALL TWICE WITH THIS HACKSAW TO INSTALL A 2" AIR VENT. I DON'T WANT TO DO IT ON THE OPPOSITE SIDE OF THE GARAGE AGAIN.