Our extended-length hole saws are perfect for fabricators who are tired of wasting time notching with standard depth hole saws. Finally, you can notch without a grinder! Stock up and be prepared for any notching job, even off-angle. Fine tooth pitch allows for cleaner cuts and increased performance on thin material. Deep Saws are also great for contracting and construction work, able to cut through thick materials without the need for a spade bit or chisel. These are our design, and they are imported. These will work in any standard notcher that uses hole saws. Arbor fitment 5/8-18 thread.