A hole saw includes a substantially cylindrical body defining a cutting end and an axis of rotation. The hole saw also includes first and second apertures formed through the body and spaced from the cutting end such that a portion of the body extends between the cutting end and both the first and second apertures. The first and second apertures are both configured to receive a tool for removing work piece plugs from within the cylindrical body. The first aperture is axially spaced from the cutting end a first distance. The second aperture is axially spaced from the cutting end a second distance that is greater than the first distance. The first aperture and the second aperture are separated by a portion of the body.

A holesaw arbor assembly includes an arbor body, at least one drive pin, a base support plate, a support surface, and a resilient member. The arbor body extends along an axis and has a threaded portion configured to engage a corresponding threaded portion of a holesaw. The drive pin is supported by the arbor body and is configured to engage an aperture in the base of the holesaw. The base support plate is disposed relative to the arbor body and is movable axially to support the base of the holesaw. The support surface is fixed relative to the arbor body and non-movable axially. The resilient member is positioned between the support surface and the base support plate, biasing the base support plate axially toward the base of the holesaw. This arrangement provides compliance as the holesaw is threaded onto the arbor, enabling alignment of the apertures with the drive pin and allowing the holesaw base to seat firmly against the base support plate in a manner that limits excessive tightening and reduces the potential for gaps.

A hole cutter has a cylindrical blade body including a cutting edge and one or more axially-elongated apertures formed within a side wall of the blade body. The axially-elongated aperture is configured to receive a lever, such as a screwdriver, therethrough. Each axially-elongated aperture includes a first fulcrum axially spaced adjacent to the cutting edge, a second fulcrum axially spaced further away from the cutting edge than the first fulcrum, and optionally a third fulcrum axially spaced between the first and second fulcrums. A lever, such as a screwdriver, can be inserted into the aperture and placed against each of the fulcrums to lever slugs out of the interior of the blade body.