A wrench structure includes a first wrench body, a second wrench body, and a pivot member. The first wrench body is provided with a first mounting portion which is a hexagonal through hole. The first wrench body has a first end provided with a first pivot portion, and a second end provided with a second mounting portion which is a square head. The first pivot portion is provided with a first pivot hole. The second wrench body is provided with a second pivot portion which is pivotally connected with the first pivot portion of the first wrench body. The second pivot portion is provided with a second pivot hole. The pivot member extends through the second pivot hole and the first pivot hole, such that the second wrench body is pivotally connected with the first wrench body.

A two-jaw adjustable wrench wherein both jaws are movable simultaneously toward or apart from each other.

A support rod for a hollow, flexible torque transmitting shaft for treating a bone includes support and flex portions. When the rod is received at a desired position within the shaft, the support portion extends through a first non-bendable portion of the shaft. An outer diameter of the support portion substantially corresponds to an inner diameter of the shaft to support the first portion. When the support rod is received at the desired position, the flex portion extends through a second bendable portion of the shaft. The flex portion includes a holding portion having an outer diameter substantially corresponding to an inner diameter of the second portion and a gap portion having an outer diameter reduced relative to the outer diameter of the holding portion to form an annular gap between the gap portion and an inner surface of the holding portion.

A tool for sizing a workspace includes a first link with a link body and a tool element. The tool includes a second link connected to the first link, where the second link is capable of rotation or translation with respect to the first link, and where the first link and the second link are selectively securable relative to each other. The tool includes a third link connected to the second link, where the third link is capable of rotation or translation with respect to the second link, and where the second link and the third link are selectively securable relative to each other.

A shaft for a dental screwdriver configured to be inserted into a bore cavity of a dental prosthetic. The shaft has a drive tip for driving a dental screw used to fix the dental prosthetic to the dental implant when the shaft is inserted into the bore cavity of the dental prosthetic. The drive tip is made of a shape memory smart alloy. The shaft also has an axial shaft portion made of a shape memory smart alloy with different material characteristics than the shape memory smart alloy of the drive tip. The axial shaft portion is configured to elastically bend from an original shape to a bent shape along the axial shaft portion without imparting a bending action and torqueing forces along the drive tip when the dental screwdriver is inserted into the bore cavity of the dental prosthetic.

A nut runner accessory for a power-driven tool is provided. The nut runner accessory can include a gear assembly received in a housing. The gear assembly transfers an externally generated force to a driver head of the nut runner accessory. The nut runner accessory can include an alignment device that can be automatically or manually operated to align an open ended slot of the gear assembly and driver head with an open ended slot of the housing. The alignment of respective open end portions of the open ended slots defined by the gear assembly, driver head, and housing allows a nut/threaded rod to be inserted into and removed from an engagement portion of the nut runner accessory.

A multi-tool assembly includes a grip and a receiver that is extendable through the grip. The receiver has a first half pivotally coupled to a second half thereby facilitating the receiver to be bent into a plurality of angles. A plurality of bits is provided and each of the bits is insertable into a respective one of the first wells or the second wells for storage. Each of the bits is positionable into the receiver to tighten or loosen a fastener. A ratchet is integrated into the grip and the ratchet engages the receiver when the receiver is extended through the grip. The ratchet facilitates the grip to ratchet around the receiver in either a first direction or a second direction. In this way the grip can be rotated back and forth around the receiver for tightening or loosening the fastener.

Provided are a screw driver system and a screw driving bit. The screw driving bit includes a body having a first end and a second end with a longitudinal axis defined therebetween and an outer surface between the first and second ends. The screw driving bit includes a first circumferential groove and a second circumferential groove that are affixed in coaxially positioned arrangement about the longitudinal axis on the outer surface of the body each having a bottom surface. The bottom surface of the first circumferential groove defines a first outer diameter that is larger than a second outer diameter defined by the second circumferential groove. The guide clamp includes a jaw for holding the screw driving bit. When engaged with the first circumferential groove, the guide clamp prevents rotation of the screw driving bit. When engaged with the second circumferential groove, the guide clamp does not prevent rotation of the screw driving bit.

A pneumatic wrench includes a handlebar having a main body, two extension walls defining an engagement notch therebetween, and a first air channel extending inside the main body and the two extension walls, and a tool head having a head portion, a neck portion extending from the head portion into the engagement notch, and a second air channel extending inside the head and neck portions. A pivot shaft is inserted through the handlebar and the tool head such that the tool head is swingable relative to the handlebar. The pivot shaft has a shaft body with a shaft hole, and two first and one second through holes in air communication with the shaft hole. The first air channel is communicated with the second air channel via the first and second through holes and the shaft hole. As such, the pneumatic wrench is angle-adjustable to fulfill user's need.