The Irwin hole saw mandrel drives bi-metal hole saws from 9/16" to 1-3/16" in diameter. The 1/2" 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.

• 1/2" hex shank - fits 3/8" and 1/2" drill chucks
• Accepts bi-metal hole saws from 9/16" to 1-3/16"
• Threadless design prevents bind-up on the arbor
• Removable pilot drill for easy replacement
• Tough, durable steel construction

Tip: Match this mandrel with the smaller-diameter saws in the bi-metal range. For hole saws 1-1/4" and larger, step up to a 3/8" hex shank mandrel designed for the bigger saw threads.