Vector Plus Black Dry Core Bits are as tough as they come. Armed with side diamonds around the core, these bits have the ability to increase hole diameters from the inside out. You can expect over 100 holes in certain applications. These bits are designed for wet or dry use. Reliability, consistency and speed are the best qualities of the Vector Plus Black Dry Core Bit. The Vector Plus Black Dry Core Bit comes with a turbo style segment for our fastest cutting core bit.