A modular drill is disclosed. The modular drill includes a tool shank extending along a rotational axis. The tool shank includes a shank top end and a shank bottom end along a rotational axis and includes a cam slot extending at least partially through a width of the tool shank. The modular drill includes a cutting head extending from a cutting head top surface to a cutting head bottom surface centered on the rotational axis. The cutting head includes a draw pin extending from the bottom surface of the cutting head along the rotational axis and a draw pin notch. The modular drill includes a clamping cam including a cam shaft contacting the draw pin notch.

An arbor for a hole saw. The arbor includes an arbor stem having at least one arm with a threaded portion configured to engage the hole saw. The arbor further includes an actuator rotatable to move the at least one arm and a body mounted to the actuator. The body has a channel that receives the at least one arm. Moreover, the arbor includes at least one magnet positioned within the at least one arm.