One bit did not last through a 1 " granite, even though water was used as lubricant. Also the bit is not deep enough to go all the way through 1" granite. You have to remove 1/4" off the top of the core to finish the hole.

This hole saw set with the diamond bit worked perfectly.The included suction bit holder was a great idea! It held the bit in place and the bit cut through the 3/8 inch thick tile like it was butter.Loved using this tool! Definitely worth the price.I would recommend this product!

Worked really well and excellent quality! Glad I purchased this kit instead of more expensive alternatives. Thanks for attention!