Commonly referred to as a combination drill and countersink, this #1 x 1-1/2" OAL 90-Degree Uncoated Solid Carbide Center Drill Bit is used in metalworking to drill and countersink in a single pass. It is also useful for starting hole for a larger-sized drill bit or to make an indentation in the end of a piece in order to mount a lathe center.
![90-Degree Countersink / Center Drill 90-Degree Countersink / Center Drill](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/140151/303769/center-drill__31750.1447276147.1280.1280__47773.1586736372.jpg?c=2)