Commonly referred to as a combination drill and countersink, this #8 x 4" OAL 82-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.
![#4 x 4" OAL 82-Degree Solid Carbide Center Drill, USA (Qty. 1) #4 x 4" OAL 82-Degree Solid Carbide Center Drill, USA (Qty. 1)](https://cdn11.bigcommerce.com/s-gdy1ehz/images/stencil/500x659/products/140145/422592/center-drill__61304.1447276163.1280.1280__82567.1646062814.jpg?c=2)