100mm / 4 inch Concrete Hole Saw with 250mm SDS Plus Shank Connecting Rod Cement Hole Saw for Cement Brick Concrete Stone Wall (100mm (4 inch))

This tool was complete and packaged well. This is a project that I was dreading doing because I was afraid it was going to be a struggle and look ugly when done not to mention take forever. I was wrong. I was drilling through cinder block on the outside and on the inside what 2 x 4 stud with sheet rock. I tried to center on the cinder block to prevent hitting the rib of the cinder block. turns out this type block was different than any cinder block I have ever seen. Turns out there were two ribs and I hit them both. I began from the outside and drilled as far as I could. Then I took a sharp 1/4″ rod and drove it through to the inside to see where the pilot hole of the hole saw should begin. Turns out there was a wood stud that was along one side and no way avoid it. I ran the hole saw enough to mark the stud showing where the drill needed to cut. I drilled a bunch of holes in the groove the saw made through the stud as close together as I could. Then used the whole saw to do the rest. It worked fine. In the cinder block the saw cut so smooth and easy. It didn’t take long at all. It is too bad I will never use it again because it would cut many holes with ease.