A conduit reamer with a lanyard receiver, inner and/or outer cutting blades is provided. The lanyard receiver is located along an axis of the handle near the tool's center of gravity. For example, the lanyard receiver is located between the handle and a bit retainer near the center of gravity. In this orientation, the lanyard receiver prevents tipping of the conduit reamer and retains the bit within the bit retainer when the conduit reamer is dropped. The inner and outer cutting blades include an acute angle that is between 45 and 90 degrees to deburr an end of a conduit.

The invention relates to a screwing tool for transmitting a set torque. Two torque-limiting arrangements (5, 7) are provided that are biased by the same spring element (9).

A screwdriver comprises a handle including a butt and a shank extending from the handle and including a tip. The butt includes a first indicating element having a shape corresponding to the tip and a plurality of second indicating elements arranged around the first indicating element. Each of the second indicating elements has the shape.

A torque-limiting device having two torque transfer bodies, which, as a consequence of oblique flank contact during relative rotation about an axis, can be moved relative to each other in the direction of the axis against the restoring force of a spring element, which is supported on a shoulder of an abutment, the position of which shoulder is set during calibration of a limiting torque. The torque-limiting device is calibrated by applying a predefined force to the spring element. The resulting spring length defines the axial position of the shoulder of the abutment, which axial position is irreversibly fixed.

A grip bar for a hexagonal wrench includes a grip, a middle sleeve, an outer sleeve and a rotary member. The grip has an elongate body, a raised portion, multiple first recesses, a head, an elongate slot and a first threaded portion. The middle sleeve includes a first chamber, a first opening, a shoulder and an end hole. The outer sleeve is mounted to the middle sleeve. The rotary member is rotatably inserted in the end hole of the middle sleeve. The first and second threaded portion are connected to each other. The first recesses and the elongate slot respectively accommodate the first section and the second section of a hexagonal wrench. The grip and the rotary member respectively restricted by the shoulder and cannot slip within the middle sleeve so that the hexagonal wrench is firmly combined with the grip and operated efficiently.

A click system. Also, a screwdriver that includes a ratchet system. The ratchet system includes at least one handle, at least one rod with a male distal end and a proximal end, an element of cooperation that includes at least two lugs and at least two grooves, each of the at least two grooves include a helical portion. The at least two lugs each cooperate in a predetermined rotation direction with one of the at least two grooves so as to allow the driving of the rod. The ratchet system may be used in mechanics, carpentry or surgery.

A grip device includes a tubular body, an adjustment member, a left slide and a right slide. The body includes a passage, a guiding slot, a recess and a groove. The adjustment member includes threaded portion. The left slide is slidably located in the groove and includes threads which are engaged with the threaded portion of the adjustment member. When the adjustment member is rotated relative to the pin, the threaded portion of the adjustment member drives the threads of the left slide to move the left slide toward the right slide so as to clamp the hexagonal wrench.

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 torque tightening device having a gripping handle, an axial rod associated with the gripping handle and arranged to carry a tightening tool and containing a rigid body. A peripheral ring mounted on a fluted tube has a spiral thread, onto which is threaded an end tip of the body, in the form of a threaded bushing, the thread of which is complementary to the thread engaged with same. The peripheral ring is linked to the fluted tube and the end tip is linked to the body. The two threads link the fluted tube and the body. Rotation of the body causes the fluted tube to move in a linear manner. In practice, each “click” of the mechanism moves the fluted tube, for example, a fraction of a turn, and causes the two elements to move axially relative to each other, to disconnect the gripping handle and the axial rod.

A screwdriver assembly includes a screwdriver shaft and an insert. The screwdriver shaft extends longitudinally from a proximal end to a distal end and having a longitudinal channel extending therethrough. The insert has a longitudinal shaft received within the longitudinal channel and a distal end extending distally relative to the distal end of the screwdriver shaft. The insert shaft is rotatable relative to the screwdriver shaft. The distal end of the insert is sized and shaped to engage a head of a screw. The distal end of the insert is disengaged from the screw bead by rotating the insert relative to the screwdriver shaft.