Spyder Hex10 arbor - 1/2-in hex, 5/8-18 thread Spyder's Rapid Core Eject™ arbor removes cores without prying, cuts at an angle, and enlarges existing holes Fits on Spyder Hex10 pilot bits Torque pins lock the hole saw in place - no tools are required to change out hole saws on the arbor 2-7/8-In drilling depth