Archer PRO 7" in. Turbo Contour Diamond Blades for Curved Cutting

Needed a way to cut concrete away from many steel windows to make room for a window stool on the interior. Without this blade, the arbor nut holding a flat blade in a circular saw would have interfered with the window frame or glass. This blade allowed me to use a plunge cut saw to cut flush with the window frame. Thanks to Amazon, this blade showed up during a search for "diamond blade". The big box stores don't sell these. The only trouble I had is that the straight plunge cut can't go more than approximately 5/8 before the saw starts to complain. I suspect this is due to the increasing amount of surface area being cut by the wedge shape as the cut gets deeper. Keep the blade cool with either water or frequent rests between shallow cuts. Can't comment on durability since I only had to cut around 30 total feet at .75 inch deep. Note: The safety notice packaged with the blade states that it is intended for straight line cutting only.