A hole cutter assembly is operable to cut a plurality of different sized diameter holes in a work piece. The hole cutter assembly includes an arbor configured to connect to a power tool for rotation about an axis, and a body coupled to the arbor for rotation with the arbor. The body defines an aperture. The hole cutter assembly includes a drill bit removably received in the aperture of the body for rotation with the arbor, an arm moveably coupled to the body, and a cutting blade coupled to the arm and moveable with the arm relative to the body. The arm is moveable relative to the body to adjust a cutting diameter of the hole cutter assembly when the drill bit is not received within the aperture. The arm is fixed relative to the body when the drill bit is received within the aperture.

Systems, apparatus, and methods may be adapted for grafting tissue at a tissue site that may include an elongate housing and a plurality of elongate cutting members. The plurality of elongate cutting members may define a cutting surface at a distal end of the elongate housing. The cutting surface may be adapted to contract from a first diameter to a second diameter that is less than the first diameter. The contraction of the cutting surface from the first diameter to the second diameter may define a tapered profile between the first diameter and the second diameter suitable for obtaining a tapered graft.

A cutting tool is shown for cutting, handling and then ejecting disks of material cut from a sheet or like material, the tool comprising: a body having a proximal end adapted to be rotatably driven about an axis, and having a distal end including a generally cylindrical cutting portion rotatable about said axis for cutting and receiving said disks; an ejector slideable parallel with the axis and within said cylindrical cutting portion for ejecting the received cut disks; and a grip rotatably mounted to the body such that the grip can be held without substantial rotation while the body is rotated said grip being operable to cause said sliding of the ejector and for ejecting the disks.

A cutting tool is shown for cutting, handling and then ejecting disks of material cut from a sheet or like material, the tool comprising: a body having a proximal end adapted to be rotatably driven about an axis, and having a distal end including a generally cylindrical cutting portion rotatable about said axis for cutting and receiving said disks; an ejector slideable parallel with the axis and within said cylindrical cutting portion for ejecting the received cut disks; and a grip rotatably mounted to the body such that the grip can be held without substantial rotation while the body is rotated said grip being operable to cause said sliding of the ejector and for ejecting the disks.

A nail head removal tool is disclosed to be rotated by an electric drill to cut off the rusted head of a nail that has been driven into a wooden surface. The nail head removal tool includes an outer cutting body having a cylindrical cutting end with a plurality of cutting teeth extending therearound. An inner cutting insert is press fit into an insert cavity formed in the cylindrical cutting end of the outer cutting body. The inner cutting insert has a pair of cutting blades spaced from one another and standing upwardly from a cutting head of the insert. When a rotational force is applied to the tool, the cutting teeth at the cutting end of the outer cutting body cut into the surface around the nail, and the cutting blades at the cutting had of the inner cutting insert cut off and pulverize the rusted nail head.

A mandrel assembly includes a mandrel, adapter, and bit coupler. The mandrel includes a shank part axially disposed in the mandrel, an adapter receiver, and a coupler receiver. An internal hole runs axially through the adapter. The coupler includes first and second axial sections, and an axial bit connection hole with a polygonal section proximate to an inner side, and a cylindrical section proximate to an opening. An outer wall of the adapter fits with an inner wall of the adapter receiver. An outer wall of the first section fits with an inner wall of the coupler receiver. An outer wall of the second coupler fits with the internal hole of the adapter. The mandrel transmits torque, via the adapter receiver and coupler receiver, to the adapter and then to a hole saw coupled to the adapter, and to the coupler and then to a bit coupled to the coupler.

A center locator is operated with a hole center for enlarging a round opening and includes a center seat having a through hole centrally defined therein, wherein the through hole is adapted to allow a centering drill of the hole cutter extending through the center seat. At least one adjusting device is longitudinally mounted to the center seat and formed with an engaging portion, wherein the at least one adjusting device is expandable relative to the center seat for adjusting a distance between the engaging portion of the at least one adjusting device and a center of the center seat.

A circular jig apparatus to allow cutting or marking of large circular holes in sheets of material using a tool with a cutting blade or marking device is disclosed. This apparatus includes a system to hold the hold the tool in place, adjust the size or radius of the circular hole, and guide the cutting blade or marking device around in a circle on the sheet of material. In particular the cutting tool may be a vibrating blade. A system is also disclosed to match the curvature of the cutting blade to the arc or radius of the circle being cut. A system is also disclosed to provide a depth stop for the cutting blade. A system to hold a wide variety of marking or dispensing devices for use with the circular jig is also disclosed.

Systems, apparatus, and methods may be adapted for grafting tissue at a tissue site that may include an elongate housing and a plurality of elongate cutting members. The plurality of elongate cutting members may define a cutting surface at a distal end of the elongate housing. The cutting surface may be adapted to contract from a first diameter to a second diameter that is less than the first diameter. The contraction of the cutting surface from the first diameter to the second diameter may define a tapered profile between the first diameter and the second diameter suitable for obtaining a tapered graft.

A hole cutter assembly is operable to cut a plurality of different sized diameter holes in a work piece. The hole cutter assembly includes an arbor configured to connect to a power tool for rotation about an axis, and a body coupled to the arbor for rotation with the arbor. The body defines an aperture. The hole cutter assembly includes a drill bit removably received in the aperture of the body for rotation with the arbor, an arm moveably coupled to the body, and a cutting blade coupled to the arm and moveable with the arm relative to the body. The arm is moveable relative to the body to adjust a cutting diameter of the hole cutter assembly when the drill bit is not received within the aperture. The arm is fixed relative to the body when the drill bit is received within the aperture.