Will even cut U-shaped channels
The term ''curved hole'' may seem like an oxymoron (aren't all fasteners straight?), but you'll find that it's actually very handy to be able to cut a hole that deliberately wanders a bit - for conduit, wiring and other installation tasks. And for this, you need a tool that's designed for the job.

The secret lies in the special double-flute cutting edges and in the ultra-thin 4'' long shanks. Cut forwards and backwards, straight, curved. Sizes are 3/8, 1/2, 5/8, 3/4, 7/8, 1 and 1-1/4''. China.