A screw bit body which allows for efficient torque force application onto a socket fastener from a variety of angles. 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 concave surface, a convex surface, and an engagement cavity. The convex surface is adjacent to the first base and the concave surface is adjacent to the second base to create a ball-like shape. 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. Additionally, the engagement cavity traverses into the screw bit body from the first base to the second base.

A method of determining an actual amount of torque and/or angle applied to a work piece by a tool. In an embodiment, the method includes determining a rotational angle, a tilt of the tool, and a measured torque of the tool. The actual amount of torque or angle applied to the work piece is then determined based on the rotational angle, the tilt, and the measured torque.

A ratchet wrench capable of rotating quickly and driving rotation includes a handle, a rotary head, a positioning mechanism, and a sleeve. The handle includes an arm and a bar body. The bar body includes an accommodating slot; the arm includes a through hole. The rotary head is connected to the arm and includes recess portions. The positioning mechanism includes a positioning element, a resilient body, and a block element. The resilient body receives the positioning element and is received in the through hole, the positioning element is correspondingly disposed in any of the recess portions, and the block element is connected to the positioning element. The sleeve receives the bar body and operably drives the block element to slide in the accommodating slot, so that the positioning element is positioned and selectively engaged with any recess portion.

A locking clutch ratchet wrench (1) is configured such that a clutch ring (500) forms the mid part of aminate like structure. Under torque applying conditions, the compression forces applied to the clutch ring (500) are substantially dissipated around the circumference (507) of the clutch ring. This inwardly directed force clamp against the inherently strong outer surface 405 of the drive element (400). The resultant pseudo laminate structure of the drive element (400), clutch (500) and housing (201, 202) enables the construction of a proportionately stronger ratchet wrench of reduced height or width.

A hand tool includes a head and a handle. The head is pivotally mounted to the handle, permitting the position of the head to be changed relative to the handle. In addition, the tool includes a primary locking mechanism and a secondary locking mechanism. The primarily locking mechanism primarily fixes the head relative to the handle in a particular position. The secondary locking mechanism can be used to further lock the head and handle. The locking mechanisms are actuated by movement of a sleeve which is located on the handle.

A method of determining an actual amount of torque and/or angle applied to a work piece by a tool. In an embodiment, the method includes determining a rotational angle, a tilt of the tool, and a measured torque of the tool. The actual amount of torque or angle applied to the work piece is then determined based on the rotational angle, the tilt, and the measured torque.

A foldable handle includes a connection section and a grip section. A recess is defined in the connection section and a function part is located in the recess. A restriction unit extends through the connection section to pivotably connect the function part to the connection section. The restriction unit is operated to restrict the function part to be co-axial with the handle, or to restrict the function part to be an angle relative to the handle. The function part includes a neck received in the recess so as to make the foldable handle be compact for convenience of storage.

The invention concerns a gripping handle (1) comprising: a main body (3), a receiving orifice (4) formed within the main body (3) for receiving a sliding removable working bit (2), a blocking lever (14) rotatably mounted on the main body (3) between: a blocking orientation in which it blocks the sliding of the working bit (2), a release orientation in which it enables the sliding of the working bit (2), an elastic pivot (15, 16) designed to bring, by itself, the blocking lever (14) back in the blocking orientation, the gripping handle (1) being characterized in that the main body (3), the blocking lever (14) and the elastic pivot (15, 16) are integral with each other. Surgical instrumentation.

A hand tool includes a head and a handle. The head is pivotally mounted to the handle, permitting the position of the head to be changed relative to the handle. In addition, the tool includes a primary locking mechanism and a secondary locking mechanism. The primarily locking mechanism primarily fixes the head relative to the handle in a particular position. The secondary locking mechanism can be used to further lock the head and handle. The locking mechanisms are actuated by movement of a sleeve which is located on the handle.