A screwdriver has a barrel, a screwdriver-bit assembly, and a push assembly. The screwdriver-bit assembly has a screwdriver-bit seat, multiple screwdriver-bit shafts, and multiple screwdriver-bit resilient elements. The screwdriver-bit seat is fixed in the barrel and has multiple locating holes. Each one of the screwdriver-bit shafts is slidably mounted through a respective one of the locating holes. The screwdriver-bit resilient elements abut the screwdriver-bit shafts such that the screwdriver-bit resilient elements tend to retract inside the barrel. The push assembly has an abutting mechanism, an abutting rod, and a plunger. The abutting rod is connected to the abutting mechanism and is selectively aligned with one of the screwdriver-bit shafts. A press of the plunger forces the screwdriver bit to protrude. Another press of the plunger makes the screwdriver-bit shaft retract inside the barrel and makes the abutting rod align with another one of the screwdriver-bit shafts.

A screwdriver has a barrel, a screwdriver-bit assembly, and a push assembly. The screwdriver-bit assembly has a screwdriver-bit seat, multiple screwdriver-bit shafts, and multiple screwdriver-bit resilient elements. The screwdriver-bit seat is fixed in the barrel and has multiple locating holes. Each one of the screwdriver-bit shafts is slidably mounted through a respective one of the locating holes. The screwdriver-bit resilient elements abut the screwdriver-bit shafts such that the screwdriver-bit resilient elements tend to retract inside the barrel. The push assembly has an abutting mechanism, an abutting rod, and a plunger. The abutting rod is connected to the abutting mechanism and is selectively aligned with one of the screwdriver-bit shafts. A press of the plunger forces the screwdriver bit to protrude. Another press of the plunger makes the screwdriver-bit shaft retract inside the barrel and makes the abutting rod align with another one of the screwdriver-bit shafts.

Disclosed a screw tightening angle conversion head, including a conversion head body, wherein one end of which is fixedly provided with a mounting groove, a fixed cover plate is fixedly arranged at the upper end of the mounting groove, a transmission worm is rotatably arranged at one end inside the conversion head body close to the mounting groove, one end of the transmission worm penetrates through the conversion head body and extends out from an outer end, a rotating seat is fixedly arranged at a rotational junction between the transmission worm and the inside of the conversion head body, annular worm teeth are fixedly arranged at the outer side of the transmission worm, a rotating shaft is rotatably arranged at one end inside the conversion head body away from the transmission worm, and the outer wall of the rotating shaft is fixedly connected with an intermediate gear.

Disclosed a screw tightening angle conversion head, including a conversion head body, wherein one end of which is fixedly provided with a mounting groove, a fixed cover plate is fixedly arranged at the upper end of the mounting groove, a transmission worm is rotatably arranged at one end inside the conversion head body close to the mounting groove, one end of the transmission worm penetrates through the conversion head body and extends out from an outer end, a rotating seat is fixedly arranged at a rotational junction between the transmission worm and the inside of the conversion head body, annular worm teeth are fixedly arranged at the outer side of the transmission worm, a rotating shaft is rotatably arranged at one end inside the conversion head body away from the transmission worm, and the outer wall of the rotating shaft is fixedly connected with an intermediate gear.

Multi-mode torque drivers employing anti-backdrive units for managing pedicle screw attachments with vertebrae, and related systems and methods are disclosed. A spinal column includes vertebrae in an articulating structure protecting a spinal cord. Medical intervention may involve limiting the relative motion between vertebrae by fusing vertebrae together with mechanical assemblies, including pedicle screws attached to the vertebrae. A torque driver may be used to form the pedicle screw attachments with vertebrae. By including an anti-backdrive unit and a motor assembly enclosed within a handle body as part of a multi-mode torque driver, the user may apply sequential combinations of manual and motorized torques to the screws with high levels of tactile feedback as desired. In this manner, pedicle screw attachments may be efficiently achieved with fewer injuries to the patient and surgeon while minimizing screw attachment failures.

Multi-mode torque drivers employing anti-backdrive units for managing pedicle screw attachments with vertebrae, and related systems and methods are disclosed. A spinal column includes vertebrae in an articulating structure protecting a spinal cord. Medical intervention may involve limiting the relative motion between vertebrae by fusing vertebrae together with mechanical assemblies, including pedicle screws attached to the vertebrae. A torque driver may be used to form the pedicle screw attachments with vertebrae. By including an anti-backdrive unit and a motor assembly enclosed within a handle body as part of a multi-mode torque driver, the user may apply sequential combinations of manual and motorized torques to the screws with high levels of tactile feedback as desired. In this manner, pedicle screw attachments may be efficiently achieved with fewer injuries to the patient and surgeon while minimizing screw attachment failures.

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 head by rotating the insert relative to the screwdriver shaft.

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 head by rotating the insert relative to the screwdriver shaft.

A golf club wrench with a bit portion having a plurality of tip features at one end of the bit portion is disclosed herein. The tip features may include threading, a Philips head shape, a flat head shape, a Torx® head shape, and a hex wrench shape. The different tip features on the wrench can be used to engage with both a mechanical fastener and a weight. The wrench may also include a handle contoured to fit within the hand of a golfer. The golf club wrench can be provided in a kit containing weights and mechanical fasteners having engagement features that mate with one or more of the tip features on the wrench.

A golf club wrench with a bit portion having a plurality of tip features at one end of the bit portion is disclosed herein. The tip features may include threading, a Philips head shape, a flat head shape, a Torx® head shape, and a hex wrench shape. The different tip features on the wrench can be used to engage with both a mechanical fastener and a weight. The wrench may also include a handle contoured to fit within the hand of a golfer. The golf club wrench can be provided in a kit containing weights and mechanical fasteners having engagement features that mate with one or more of the tip features on the wrench.