Will this work with a 4" hole saw?

The Irwin hex bit model number 88601BX is a 7/16" shank designed for use with various tools, including hole saw arbors. Whether it will work with a 4" hole saw depends on the hole saw arbor compatibility. Most 4" hole saws use a larger arbor size compatible with 7/16" shanks, so it is likely that this hex bit will work with your 4" hole saw. To confirm compatibility, check the following: Hole Saw Arbor Size: Ensure your 4" hole saw uses an arbor that accepts 7/16" shank bits. Hex Bit Length: Verify the hex bit length is appropriate for securely attaching the hole saw and providing the necessary depth. If your hole saw arbor matches these specifications, the Irwin model 88601BX should work.