A screwdriver capable of driving screws with any shape of head comprises a fixing member and a main body. The main body comprises a first end and a second end, the fixing member fixes on the first end of the main body. The screwdriver further comprises a number of hard and small-diameter cores and a button. The cores are contained in the main body and are partially exposed out of the main body, the button is configured on the second end of the main body and resists against one end of the number of cores. The button drives a part of the number of cores to form a head to match a screw.

A hand tool includes a handle having a room defined therein. A first and second lugs extend from the front end of the handle. A space is defined between the first and second lugs and communicates with the room. A working part is to be connected with a bit, and has a pivotal portion which is pivotably connected between the two lugs. A plate is connected to at least one of the first and second lugs, and has multiple first recesses and a second recesses. A positioning member is located between the pivotal portion and the plate so as to be engaged with one of the first and second recesses to position an angular position of working part. The working part is able to be pivoted and received in the room in the handle.

The instant invention is directed to a universal bone screw screwdriver and in particular to a universal screwdriver that permits the removal of screws from bone plates that are manufactured by different manufacturers having distinct characteristics. The universal bone screw screwdriver comprises a handle that is adapted to removeably receive an elongated tool bit having a hollow center. The elongated tool bits correspond to the screw heads of different manufacturers. The universal bone screwdriver further comprises a torque limiting and locking spring to secure the elongated tool bit to the handle and inhibit over-tightening of the bone screw into the bone or bone plate as the case may be.

A tool bit includes a hexagonal drive portion, a working end, and a shank. The working end is made of a first material and a has a first hardness. The shank connects the drive portion to the working end. The shank defines a longitudinal axis about which the tool bit is rotatable. The shank is made of a second material having a second, different hardness. The shank includes a protrusion and an annular shoulder. The shank extends within a portion of the working end and has a distal end. The annual shoulder surrounds the protrusion. At least one of the distal end or the shoulder is oriented perpendicular to the longitudinal axis.

An anti-slip fastener remover tool includes a torque-tool body, a plurality of paired engagement features, and an intersection point. The plurality of paired engagement features that grips the lateral surface of the stripped fastener head is radially positioned around a rotation axis of the torque-tool body. The plurality of paired engagement features, wherein each paired engagement feature is offset by 30 degrees, comprises a first engagement feature and a second engagement feature. The first engagement feature and the second engagement feature each comprises a bracing section, a cavity section, and a connector section that are adjacently connected to each other. The cavity section of the first engagement feature is adjacently connected to the cavity section of the second engagement feature. The bracing sections of the first engagement feature and the second engagement feature are oppositely positioned of each other about the cavity sections of the first and second engagement features.

Improved connection techniques are provided. In some embodiments, specialized connectors are provided with both physical fastening and signal-conducting attributes. In some such embodiments, signals related to conditions of a connector are passed through the connector. In other embodiments, multiple-section connectors are included, which may be self-actuating and create remotely-detectable conditions and signals.

An interchangeable finger insert system for a bowling ball is provided. An inner sleeve has a cylindrical opening defined at a top end. A base encloses a bottom end of the inner sleeve. A fastener-head feature is defined in the base and accessible through the cylindrical opening. An engagement feature is formed along an exterior surface and configured to allow the inner sleeve to be rotationally inserted into an internal bore. A fastening tool with an elongated shaft and a locking feature defined at a distal end of the shaft is provided. The locking feature shaped to engage the fastener-head feature defined on the inner sleeve. The locking feature of the fastening tool engages the fastener-head feature on the inner sleeve, and rotation of the fastening tool is configured to rotate the inner sleeve into the internal bore thereby locking the inner sleeve in the bowling ball.

A ratchet hand tool includes a grip, a shaft member, an operating member, a positioning member, two pawls, and a first elastic member. When one of the pushing portions pushes against a corresponding one of the pawls to disengage the pawl toothed portion of the corresponding pawl from an inner toothed portion of the operating member, the corresponding pawl is pivoted through a pivot groove of the shaft member. When the pushing portion stops pushing against the corresponding pawl, the corresponding pawl is pivoted and the pawl toothed portion is engaged with the internal toothed portion. The overall volume of the ratchet hand tool can be reduced, the structure is simple, and the installation is easy.

A fastener system includes a fastener and a driver, each of which have three alternating lobes and troughs that define the drive surfaces. Each alternating lobes and troughs is defined by an outer radius portion, a drive side transition, an inner transition radius, and a reverse drive portion. The fastener recess and the driver each also have a side wall defined by the outer transition radius that tapers at a taper angle relative to a rotational axis. The fastener side wall may taper at about 60°. The driver side wall may taper at about 60°. Alternatively, the driver side wall may taper at an angle at least 10° less than the taper angle of the recess side wall, such as 42°. The drive side transition defines a drive angle, which may be between 0° and 5°.

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 a gripping point to prevent slippage in between the screw bit body and the socket fastener. The engagement cavity traverses normal and into the concave surface and the convex surface. The engagement cavity includes an angled driving portion and a concave portion. The angled driving portion is positioned adjacent to the first lateral edge with the concave portion being positioned opposite to the first lateral edge, across the angled driving portion.