A reversible, multiple-bit, hand tool for driving threaded fasteners and nuts includes a handle and a reversible tool holder assembly. The reversible tool holder assembly is insertable into the handle in either of two orientations to present two different ends provide multiple different configurations for driving different types of threaded fasteners and nuts. The reversible tool holder assembly includes a reversible adapter barrel, a first tool holder, a second tool holder, a first reversible bit holder, and a second reversible bit holder. Each of the tool holders can be selectively used as a nut driver with the holder assembly inserted in either orientation in the handle or can be removed from the adapter barrel and used separately as a power bit driver or a power nut driver (PND) that is received in any conventional chuck of a powered rotary tool.

An orthopaedic driving instrument including a first end portion, a second end portion opposite the first end portion, and a central portion, intermediate the first and second end portions, comprising a central section having an outer diameter representing a maximum outer diameter of the driving instrument. The first end comprises a first driving interface sized and shaped to, in operation of the instrument, engage a screw interface of a screw for applying torque to the screw. The second end comprises a second driving interface sized and shaped as the size and shape of the first driving interface.

A pair of screwdrivers each having a handle, a nondetachable outer shaft, a detachable inner shaft, and at least two detachable double-ended screwdriver bits. Each screwdriver handle is formed having a hollow space configured to substantially house the outer screwdriver shaft, the inner screwdriver shaft, and the at least two double-ended screwdriver bits of the other screwdriver, whereby, the pair of screwdrivers may be assembled together when not in use so that the outer shaft, the inner shaft, and the at least two double-ended screwdriver bits of both screwdrivers are substantially non-exposed to prevent the potential for accidental user injury.

A cabinet leg is provided including a body securable to an underside of a cabinet and a shaft engageable with the body such that rotation of the shaft moves the shaft toward or away from the body. A foot is secured to a lower end of the shaft including a first portion attached to the shaft and a second portion rotatable relative to the first portion. A plurality of openings are provided around the periphery of the foot for receiving a first end of a tool such that teeth on the tool engage with teeth on the first portion. Rotation of the tool causes rotation of the first portion relative to the second portion, thereby rotating the shaft and adjusting the height of the cabinet leg.

A length adjustable connection structure contains: an adjustment assembly, an engagement assembly, and a receiving tube. The receiving tube includes an insertion accommodated, a coupling portion, a groove, a trench, and an elongated slot. The engagement assembly includes a fixing portion, a toothed portion, a fitting portion, a hexagonal hole, and a circular hole. The adjustment assembly includes a connector, a locating orifice, a hexagonal column, and a C-retainer. The hexagonal column of the adjustment assembly is received in the hexagonal hole of the engagement assembly so that the engagement assembly is connected on the hexagonal column, the C-retainer is engaged in the notch of the hexagonal column, and the adjustment assembly and the engagement assembly are accommodated in the receiving tube, hence the toothed portion of the fixing portion is engaged in the groove of the coupling portion, and the fitting portion is fixed in the trench.

A socket for use in tightening or loosening a fastener is provided. The socket includes an outer wall defining a first recess at a first end and a second recess at an opposing second end. The first recess is configured to engage a nut or a head of a fastener for rotation. The second recess is configured to receive a drive member of a socket wrench. The outer wall has an outer surface. A plurality of spaced-apart rotational markings is positioned on the outer surface of the outer wall. The plurality of spaced-apart rotational markings is configured to provide a determination of the angle of rotation of the nut or the head of the fastener.

A tool bit holder that accommodates and secures specific ranges of hexagonal wrench sizes in different physical orientations therein, for four purposes: speed rotation of the tool for fast bolt extraction, support of the hexagonal wrench's shaft for an increased torque application, mechanically strengthening of a hexagonal wrench, and for the application of torque centered about the longitudinal axis of the working arm of the hexagonal tool bit so as to prevent the stripping out of the hexagonal socket in the mechanical fastener.

A tool bit includes a hexagonal drive portion, a working end, and a shank interconnecting the drive portion and the working end. The shank includes an outer peripheral surface having a curvature in a plane including a central axis of the tool bit. The outer peripheral surface having the curvature includes a length in the direction of the central axis. A ratio of the length of the outer peripheral surface having the curvature to the length of the tool bit is between about 0.2:1 and about 0.7:1.

The combination of a driver and fastener that allows a user to insert and remove the fastener by applying larger than normal torque loads to it includes: (a) a fastener with a proximal end handle and a distal end head configured to provide a standard indentation and an additional recess that provides additional surface area that allows larger torque loads to be applied to the fastener, (b) a main driver with a shaft having a central bore, a handle at its proximal end and a head at its distal end configured to allow it to be temporarily inserted into the fastener's head, and (c) an awl driver having an awl shaft with an awl handle affixed to its distal end and its proximal end including a tip configured to allow it to pass through the main driver's bore and be brought into contact with the fastener's head where it is used to cut into the fastener cannula so as to temporarily adhere the awl driver to the fastener.

A screw bit body which allows for efficient torque force application onto a socket fastener. The screw bit body includes a plurality of laterally-bracing sidewalls, a first base, and a second base. The laterally-bracing sidewalls are radially distributed about a rotation axis of the screw bit body with each further including a first lateral edge, a second lateral edge, a bracing surface, and an engagement cavity. The engagement cavity creates an additional gripping point to prevent slippage in between the screw bit body and the socket fastener. The engagement cavity traverses normal and into the bracing surface. Additionally, the engagement cavity traverses into the screw bit body from the first base to the second base. The engagement cavity is specifically positioned offset from the first lateral edge by a first distance and positioned offset from the second lateral edge by a second distance.