Drilling holes just got way easier with the Spyder Hex8 Quick Change Hole Saw Arbor! This arbor and pilot bit assembly is built for speed and convenience. It features Spyder's awesome Rapid Core Eject system: drill your hole, press a button, pull back the saw, and the core pops out - up to 5x faster than messing with prying out cores manually. You can even cut at an angle or use two adapters (sold separately) to enlarge existing holes. The arbor has a 3/8-inch hex drive and comes with a 1/4-inch HSS (high speed steel) pilot bit that works on wood, metal, and plastics. It uses a 1/2-20 thread, fits Spyder Hex8 hole saws, and also works with most standard hole saws that have a 5/8-18 thread. Maximum drilling depth is 2-7/8 inches. Perfect for contractors, DIY enthusiasts, or anyone tired of struggling with stuck cores in their hole saws!