The Irwin 373003 hole saw mandrel drives bi-metal hole saws from 1-1/4" to 6" in diameter. The 3/8" hex shank seats securely in 3/8" and 1/2" drill chucks, and the threadless design prevents the saw from binding or seizing on the arbor during use. The removable pilot drill can be replaced when worn rather than scrapping the whole mandrel.

• 3/8" hex shank - fits 3/8" and 1/2" drill chucks
• Accepts bi-metal hole saws from 1-1/4" to 6"
• Threadless design prevents bind-up on the arbor
• Removable pilot drill for easy replacement
• Tough, durable steel construction

Tip: This is the workhorse mandrel for door-knob bores (2-1/8"), recessed-light cans (4"-6"), and most rough-in plumbing penetrations. Use the smaller-shank mandrel for hole saws under 1-1/4".