An anti-slip torque tool with integrated engagement features includes a torque-tool body and a plurality of engagement features. The plurality of engagement features is radially distributed around a rotational axis of the torque-tool body. Each of the plurality of engagement features includes a first cavity surface, a first bracing surface, a second bracing surface, and a second cavity surface. The first bracing surface and the second bracing surface are adjacently connected to each other through an intersection point. The first cavity surface is terminally connected to the first bracing surface through a first connection point as the first bracing surface is positioned in between the second bracing surface and the first cavity surface. The second cavity surface is terminally connected to the second bracing surface through a second connection point as the second bracing surface is positioned in between the first bracing surface and the second cavity surface.

A torque transmission driver has a first end portion adapted to receive and transmit torque from a torque generation source, and a second end portion including a shaped tapered bit having drive surfaces with an alternating series of five or six lobes and troughs about a rotational axis, having a taper angle between 15 and 45° from the rotational axis operable to engage corresponding drive surfaces in a plurality of at least two size fasteners, the tapered drive surfaces of the bit comprising a first tapered portion operable to engage drive surfaces of a first sized fastener and a second tapered portion operable to engage drive surfaces of a second sized fastener, the drive surfaces of the second sized fastener being larger than the drive surfaces of the first sized fastener.

A fully parametric profile for improved tooling in a tool/fastener system is provided that details a profile from a single proved Wright number, and that improves the contact area across a full spectrum of industry standard tolerances, while preserving safe pockets for fastener corners, thereby providing for increased tool life. The tool profile is based on a central axis and a parametric set of coordinates for flats, transition points, and multiple radii. The profile mates selectively with a set of fasteners having a central axis and a plurality of flat bounding surfaces parallel to the fastener access wherein diametrically opposite pairs of surfaces are parallel to each other and the bounding surfaces intersect in adjacent pairs to form fastener corners.

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.

Embodiments provide a fitting for tubing connection, a male fitting assembly, and a torque adaptor. The fitting for tubing connection includes a head including a plurality of first gripping portions, each first gripping portion extending from a top of the head; and a shaft attached to the head, wherein the shaft comprises a plurality of external threads.

A screwdriver device for a threaded plug includes a structure which extends along an axis and includes a head and a shank connected to a first end of the head, wherein the head has a second end which opens onto a cavity suitable for containing a head of a plug, wherein along the axis the cavity includes at least a first portion having a lateral surface which has a first profile and at least a second portion having a lateral surface which has a second profile which is not coincident with the first profile.

Tools, for example, hexagon sockets, dodecagonal sockets, splined sockets, wrenches, etc., that have inner surface geometries adapted to engage a flank of a fastener at a point away from a corner of the fastener. This increases the strength and life of the socket, reduces a risk of the fastener becoming locked or stuck in the socket, and reduces the risk of the fastener being stripped or the socket slipping on the fastener.

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 lug not engaging tool in the form of a rod includes a first end for receiving a standard socket, and a second end for engaging a socket wrench or impact wrench. An intermediate portion has a hexagonal section for engaging an open end wrench or a closed end box wrench. The rod includes sections having differing diameters. In use, a jack or jack stand may be placed under a section having an appropriate diameter to ensure that the jack or jack stand supports the lug nut engaging tool in a position that is substantially perpendicular to the wheel as the tool is used to loosen or tighten a lug nut.

An ergonomic rotational power transfer tool includes a unitary twisted polygonal prism having a first polygonal surface and a second polygonal surface. The first polygonal surface has a ratchet interface. The second polygonal surface is recessed to form an internal sidewall and an end wall that snugly hold a propane tank handwheel. The first and second polygonal surfaces are joined by an external sidewall having grooves that accommodate a user's fingers. This tool improves the ergonomics of the wrist by eliminating wrist flexion and extension and reducing the use of ulnar and radial deviation.