GSTK 10pcs Concrete Hole Saw Set （30mm 40mm 50mm 65mm）with SDS Plus Shank Connecting Rod and 5pcs Dust Catchers, Concrete Hole Saw Kit for Concrete|Cement|Brick Stone|Wall.

Initially I had a bit of reservation on these 'inexpensive' hole saws, but had a specific / immediate need to punch a ~3 inch hole through cinder block (CMU). This was for a 3 inch gas vent. This worked great! I popped it in my cordless SDS hammer and went to town. Minutes later I had a perfect round hole through the 8" block. I expected this to be a 'throw away' but it was barely worn. I have no reservation that it will hang in there for many more holes (should I need to do more...). For the cost it can't be beat and is a great value. I would recommend this for anyone that needs to easily punch clean, accurate holes through block.

100% exelente

Lo que prementen

Se ve de muy buena calidad 👌🏽

Muy bien

Excellent quality, work great.

I drilled one 2 inch hole and about half of another and that was it . The cutter was too dull to cut. I did keep the cutter in water as I was using it.

This is a great idea and it does work well on concrete but the retaining screw for the pilot drill keeps unscrewing and the pilot bit keeps falling out! I tried loctite and teflon tape, it helped prolong the usage but the set screw still managed to loosen. Also, after some use you will need a Vice and Pipe Wrench to seperate the Hole Saw from the shaft to be able to change sizes or put it back in storage. The hammering action practically welds the Hole Saw onto the shaft thread. It would have been nicer if flat areas were included on the Shaft and on the Hole Saws so you can use wrenches but since there are none a Vice and Pipe Wrench is needed and it leaves the pieces looking destroyed.