In years of renovating, I have used many other hole saws: mostly a DeWalt kit similar to&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/this-one/dp/B00005LF01/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">this one</a>, along with a Harbor Freight set (I know: why? Well, the low cost, obviously).  This Lenox Speed Slot hole saw set is amazingly better than anything I've used before. It offers fast, easy change-outs, sharp teeth that look like they'll actually last, and all packed in an excellent, sturdy case (although it's somewhat bulkier than necessary).