A cutting tool includes a hole saw, a pilot bit, and an arbor assembly. The arbor assembly includes a shank, a body, a first engagement member moveable relative to the shank, the first engagement member engaging the hole saw to releasably secure the hole saw to the shank, and a second engagement member moveable relative to the shank, the second engagement member engaging the pilot bit to releasably secure the pilot bit to the shank. The body is moveable to a first position where the hole saw and the pilot bit are secured to the arbor assembly, to a second position where the first engagement member disengages the hole saw, allowing removal of the hole saw from the shank, and to a third position where the second engagement member disengages the pilot bit, allowing removal of the pilot bit from the shank.

A tool connector includes a main body, an adapter, a first engaging member and a sleeve. The main body includes a driving end portion and a connecting end portion. The main body has a first receiving hole extending along the axial direction and a second receiving hole communicated with the first receiving hole. The adapter is non-rotatably disposed within the first receiving hole and includes a through hole configured for a tool head to be disposed therethrough. The first receiving hole, the second receiving hole and the through hole respectively have a first, a second and a third cross-sectional profiles being non-circular. The second and the third cross-sectional profiles are identical in shape and coaxially arranged. As viewed in the axial direction, at least one geometric feature of the second cross-sectional profile corresponds to at least one geometric feature of the third cross-sectional profile.

A hole saw including a plurality of sidewall openings is provided. The sidewall openings are shaped and grouped in patterns that improve debris ejection of the hole saw and that allow for easy access to the interior of the hole saw for manual debris removal by the user. The opening groups are spaced from each other by larger uninterrupted areas such that the hole saw has a high strength despite the number and size of openings provided in the saw sidewall.

An arbor for a hole saw an arbor stem, an actuator, and at least one post. The arbor stem includes at least one arm having a threaded portion configured to engage the hole saw. The actuator is rotatable about a central axis of the arbor to move the at least one arm. The actuator includes a surface facing the at least one arm and a track. The track is recessed from the surface of the actuator. The at least one post extends from the at least one arm to engage the track. The arm is movable in a radial direction in response to rotation of the actuator to vary a circumference of the arbor stem.

An adjustable step bit for use with multiple hole saws of various sizes. The device comprises a plurality of hole saws and a plurality of hole saw boots. Starting from the distal end, the first hole saw is smaller than the second hole saw, and the second hole saw is smaller than the third hole saw. Each hole saw boot is sized to fit firmly onto a corresponding hole saw. When fully assembled, the device can be attached to the mandrel of a power tool, capable of drilling a series of holes into a structure in step increments. The flexible material of the boot enables the first hole saw to slide firmly into place, which in turn, allows the user to drill a pilot hole without any wobble. This arrangement extends the lifespan of the device but also reduces the need for frequent replacements.

A hole saw having an internal saw with a circular sidewall including a working end including teeth and a backwall connected to the sidewall. The backwall includes an aperture concentrically located with respect to the circular sidewall for receiving a pilot drill designed to extend beyond the working end of the circular sidewall. The hole saw also has an external saw with a circular sidewall with a greater diameter than the circular sidewall of the internal saw. The circular sidewall of the external saw has teeth and an oppositely located proximal end that includes tangs separated by notches. A base plate is fastened to the circular sidewall of the external saw. The base plate includes a plurality of apertures for fixing the base plate to the backwall of the internal saw and locating the circular sidewalls concentric with respect to each other.

A bit-removal assembly includes a first ring coupled to an output shaft for co-rotation therewith, a second ring supported on the lower retaining ring of the output shaft, a frusto-conical surface on at least one of the first or second rings, and a wedge positioned between the first and second rings and engaging with the frusto-conical surface. A collar defines a cam surface located radially outward of the wedge. The collar is movable between a locked position, in which the cam surface is engaged with the wedge to displace the wedge radially inward on the frusto-conical surface to separate the second ring from the first ring, and a released position, in which the cam surface is misaligned with the wedge to permit the wedge to move radially outward on the frusto-conical surface. A biasing member urges the collar towards the locked position.

A hole cutting accessory for a power-driven tool may include an arbor that provides for quick release of an annular saw blade component of the accessory, and for quick release of a pilot drill bit component of the accessory. The quick release of the annular saw blade component from the arbor may be accomplished separately from the quick release of the pilot drill bit component from the arbor.

A cutting tool may include a cutting accessory defining an opening and a channel formed on an inner surface of the cutting accessory. A cutting tool may include an arbor assembly including a shank having a first end received in the opening of the cutting accessory and a second end configured to be coupled to a power tool, a body movable relative to the shank, and an engagement member movable with the body relative to the shank, the engagement member configured to selectively engage the channel of the cutting accessory to releasably secure the cutting accessory to the shank.

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.