Lenox 3L Hole Saw Arbor w/ Pilot Bit Specifications: Chuck Size: 1/2" Shank Type: Solid / Hex Compatibility: Fits hole saws 20L to 96L (1-1/4" to 6") Features: • Added durability - Hardened carbon steel for strength through the cross-section. • Starts on contact - Split point pilot drill for faster penetration and less walking. • Simple plug ejection - 7L arbor is designed with sliding pins to easily eject plugs from hole saws. • Easy to use - Power groove shank allows arbors to be used in LENOX® Uni-Drive Quick Change System. No tool changes required (3L, 5L, 6L and 7L).