Methods and apparatus for a fastener head having a dual zone socket area and a mating driver bit according to aspects of the present technology include a fastener configured with driving surfaces adapted to provide enhanced engagement between each other during use. The fastener includes a recessed socket area with a sidewall that has an upper inwardly tapering section and a lower vertical section that extends to the bottom of the recessed socket area. The upper inwardly tapering section of the sidewall may also include an offset relative to the lower vertical section to create asymmetrical driving and removal surfaces. The technology also includes a corresponding mating driver bit configured with mating surfaces to the fastener to provide enhanced engagement between the fastener and mating driver bit. The technology also allows either the fastener or the driving bit to be used with preexisting fasteners and driver bits.

A modular system for treating a bone includes a main body including a channel extending therethrough. A distal end includes a driving feature sized and shaped to engage a corresponding driving structure of one of first and second bone screws. The system also includes an inner shaft sized and shaped to be inserted into the channel and including a distal end including a retaining feature for engaging a corresponding retaining structure extending within a recess at a proximal end of the first screw. Furthermore, the system includes an outer shaft extending longitudinally and including a channel extending therethrough. The channel of the outer shaft is sized and shaped to slidably receive the main body therein and including a retaining feature extending along a distal end thereof. The retaining feature of the outer shaft engages a retaining structure extending along an exterior surface of the second screw.

A fastener extractor device for removing fasteners and disengaging the extractor from the so engaged fastener. The extractor includes a threaded main body with a hex drive head end portion and oppositely disposed elongated tool engagement hex body with multiple bracing sidewalls with independent contoured fastener engagement channels for fastener insertion and continued rotational removal. A tubular hex surface extractor nut is threadably disposed on the main body member for reversed thread rotation advancement to physically disengage the tool engagement body from the removed fastener.

A socket structure includes a body, a first fitting hole, a second fitting hole, and at least one elastic engaging member. The first fitting hole is disposed at one end of the body. The second fitting hole is disposed at another end of the body. The at least one elastic engaging member is disposed in the first fitting hole and protrudes toward an inner portion of the first fitting hole along a radial direction of the first fitting hole. When a tool is inserted into the first fitting hole, the at least one elastic engaging member is pressed and deformed by the tool and is thus engaged with the tool. The configuration of the at least one elastic engaging member makes it easier to connect a tool to and remove the tool from the socket structure.

An anti-slip fastener remover tool includes a torque-tool body, a plurality of paired engagement features, and a plurality of intersection points. 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 torque-tool body is inwardly extended from an outer wall of the torque-tool body to the plurality of paired engagement features. Each paired engagement feature comprises a first engagement feature and a second engagement feature. The first engagement feature and the second engagement feature each comprise a bracing section, a cavity section, and a connector section. The cavity sections of the first and second engagement features are adjacently connected to each other. The bracing sections of the first and second engagement feature are oppositely positioned about the cavity sections of the first and second engagement features.

Range taking shear bolts and bolt installation (drive) tools are described herein, which are configured for use with a variety of range taking connectors and conductors.

An adjustable socket assembly includes a collet having a first end, a second end, and a perimeter wall. The second end has a receiving aperture therein. The collet is divided into a plurality a plurality of sections. A sleeve has a bottom end that receives the collet. The sleeve has an interior surface that tapers inwardly and abuts the sections to move toward each other as the sleeve moves toward the second ends of the sections. A biasing member extends through a top end of the sleeve and engages each of the sections. The biasing member is actuated to bias the sleeve downward to close together the sections and engaged the valve actuator. An engagement head is attached to the upper end of the biasing member and engages a tool to rotate the collet.

Methods and apparatus for a fastener head having a dual zone socket area and a mating driver bit according to aspects of the present technology include a fastener configured with driving surfaces adapted to provide enhanced engagement between each other during use. The fastener includes a recessed socket area with a sidewall that has an upper inwardly tapering section and a lower vertical section that extends to the bottom of the recessed socket area. The upper inwardly tapering section of the sidewall may also include an offset relative to the lower vertical section to create asymmetrical driving and removal surfaces. The technology also includes a corresponding mating driver bit configured with mating surfaces to the fastener to provide enhanced engagement between the fastener and mating driver bit. The technology also allows either the fastener or the driving bit to be used with preexisting fasteners and driver bits.

An elastic element includes an inner annular wall, at least one outer annular wall, and a groove. The at least one outer annular wall connects with the inner annular wall and surrounds the inner annular wall. The groove is formed between the inner annular wall and the at least one outer annular wall. The structural designs of the inner annular wall, the at least one outer annular wall, and the groove are such that when the elastic element is applied to a hand tool, the groove provides a space that allows the inner annular wall to be deformed, making it easier for a user to fit a to-be-operated object securely in the hand tool to enhance work efficiency.

A socket includes a body, a through hole, an accommodating base and an abutting element. The body includes an outer wall and an operating inner surface. The operating inner surface surrounds an operating space, and the operating space is configured for a tool to insert therein. The through hole penetrates the outer wall and the operating inner surface radially, and the through hole is communicated with the operating space. The accommodating base is accommodated in the through hole and includes a bottom portion and a surrounding wall. The bottom portion is located at an outer end of the through hole and covers the through hole. The surrounding wall is connected to the bottom portion and located in the through hole. The surrounding wall and the bottom portion surround an accommodating space. The abutting element is disposed in the accommodating space.