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 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.

An apparatus for drilling out a plug of material, the apparatus comprising: a base plate having a top surface, a bottom surface, and a central longitudinal axis; a circumferentially-extending side wall extending distally from the top surface of the base plate, the circumferentially-extending side wall terminating in a circular distal end surface; a drill bit centered on the central longitudinal axis of the base plate and extending distally therefrom, the drill bit comprising a distal portion, a proximal portion and an intermediate portion extending between the distal portion and the proximal portion; wherein the intermediate portion of the drill bit comprises a first laterally-extending flat comprising a cutting edge disposed a first distance away from the central longitudinal axis towards the circumferentially-extending side wall and a second laterally-extending flat extending a second distance away from the central longitudinal axis towards the circumferentially-extending side wall, and further wherein the first distance is greater than the second distance.

A cutting tool includes a hole saw, a pilot bit, and an arbor assembly. The arbor assembly includes a shank, a sleeve, a first ball bearing moveable relative to the shank, the first ball bearing engaging the hole saw to releasably secure the hole saw to the shank, and a second ball bearing moveable relative to the shank, the second ball bearing engaging the pilot bit to releasably secure the pilot bit to the shank. The sleeve 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 ball bearing disengages the hole saw, allowing removal of the hole saw from the shank, and to a third position where the second ball bearing disengages the pilot bit, allowing removal of the pilot bit from the shank.

A pilot pin assembly is slidably receivable within a tool bit of a drill press. The pilot pin assembly includes a first pin defining an interior cavity, and a second pin at least partially received within the interior cavity of the first pin. A spring is positioned within the interior cavity for biasing the second pin toward an extended position relative to the first pin.

Three systems for the destruction of the data storage portion of electronic media storage devices such as hard disk drives, solid state drives and hybrid hard drives. One system utilizes a mill cutter with which the hard drive has relative motion in the direction of the axis of the mill cutter to destroy the data storage portion. A second system utilizes a laser to physically destroy the data storage portion. The third system utilizes a chemical solvent to chemically destroy the data storage portion.

A hole saw assembly is provided. The hole saw assembly includes an arbor, a hole saw, a pilot drill and an ejection member. The pilot drill includes a lock receiving groove member. The pilot drill coaxial with the hole saw extends through and beyond the hole saw. The ejection member configured to slide along the pilot drill. The ejection member includes a biasing member and a barrel coaxially aligned with the pilot drill. The ejection member also includes a sleeve coaxially aligned with the barrel. The barrel and the sleeve are configured to axially slide along the pilot drill. The ejection member further includes at least one locking member configured to engage with the lock receiving groove member to restrict the slidable movement of the barrel and the sleeve with respect to the pilot drill.

A wall magnet anchor system is used to install magnetic anchors in wall material that can be used to magnetically hold an object to the wall, thereby avoiding the need to a conventional hook that protrudes from the surface of the wall. The anchor can include a helical thread to hold the anchor in the wall. An installation tool includes a cutting features at one end for cutting a hole in a wall to receive an anchor, and an installation feature that engages the anchor and allows a user to drive the anchor, through rotation, into the hole cut by the cutting features.

A method for removing a portion of a structure is disclosed. The method includes attaching a first elongated member to the portion of the structure, receiving a second elongated member of a drilling assembly with the first elongated member, drilling into the structure with the drilling assembly while receiving the second elongated member with the first elongated member, and removing the portion of the structure that is attached to the first elongated member while urging the first elongated member with the second elongated member.

A quick change tool includes a tool element, an elongate body having a drive shaft and attaching means for attaching the tool element to the body, and a receiving element for attaching to the tool element. The receiving element includes a through-hole for receiving the body by sliding through the receiving element in the longitudinal direction of the body. The receiving element is configured to co-act with the attaching means to lock the tool element relative to the body at least in an axial direction of the drive shaft. The attaching means includes a resiliently movable locking pin arranged spring-mounted in the body. The receiving element comprises a locking hole configured to receive the locking pin therein in a snapping manner. A pin guiding groove extends between a receiving opening of the through-hole and the locking hole for guiding the locking pin from the receiving opening to the locking hole.