Spyder 1/2-in Quick Change Hole Saw Arbors

5 times faster than traditional hole saw systems. Drop out the core at the push of a button. Application uses: wood, plastics, metal. Universal arbor - fits most hole saw brands. Saves time, money, and eliminates the hassle of plug removal. Enlarge holes that are too small. Extend pilot drill length to cut at an angle. Durable high-speed steel pilot bit.