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.

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 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 torque wrench having a handle and an output shaft is disclosed. The output shaft may be constrained to turn only unidirectionally due to a ratchet. Rotation of the output shaft may be permanently disabled by an internal mechanism. Torque imposed on the output shaft may be limited by a torque responsive cam clutch. The handle forms or is part of an enclosure enclosing internal components such as the ratchet, the internal disablement mechanism, and the torque responsive cam clutch. A seal between the body and the output shaft prevents ingress and egress of lubricants and contamination between the inside of the body and the output shaft.

A torque wrench having a handle and an output shaft is disclosed. The output shaft may be constrained to turn only unidirectionally due to a ratchet. Rotation of the output shaft may be permanently disabled by an internal mechanism. Torque imposed on the output shaft may be limited by a torque responsive cam clutch. The handle forms or is part of an enclosure enclosing internal components such as the ratchet, the internal disablement mechanism, and the torque responsive cam clutch. A seal between the body and the output shaft prevents ingress and egress of lubricants and contamination between the inside of the body and the output shaft.

An external tooth type ratchet screwdriver includes a handle and a ratchet head, the handle is provided with a ratchet seat, a first pawl and a second pawl; the ratchet head is of a round-bar shape and passes through the center of the ratchet seat; the middle part of the outer surface of the ratchet head is provided with teeth; one end of the inner circle of the first pawl is provided with a ratchet teeth structure; the second pawl has the same structure with the first pawl; the end surface of the ratchet seat is eccentrically provided with a circle of annular groove, and one end of the annular groove is cut off, and arc-shaped barrier strips are oppositely arranged on a cutoff; installation seats are formed between the wall of the ratchet seat and the arc-shaped barrier strips; a reversing cover is clamped outside the ratchet seat.

An external tooth type ratchet screwdriver includes a handle and a ratchet head, the handle is provided with a ratchet seat, a first pawl and a second pawl; the ratchet head is of a round-bar shape and passes through the center of the ratchet seat; the middle part of the outer surface of the ratchet head is provided with teeth; one end of the inner circle of the first pawl is provided with a ratchet teeth structure; the second pawl has the same structure with the first pawl; the end surface of the ratchet seat is eccentrically provided with a circle of annular groove, and one end of the annular groove is cut off, and arc-shaped barrier strips are oppositely arranged on a cutoff; installation seats are formed between the wall of the ratchet seat and the arc-shaped barrier strips; a reversing cover is clamped outside the ratchet seat.

An internal tooth type ratchet screwdriver includes a handle and a ratchet head, where the handle is provided with a ratchet seat, a first pawl and a second pawl; the bottom of the ratchet head is outwardly sleeved over the ratchet seat and teeth are formed on an inner wall surface; the first pawl and the second pawl have the same structure; one end of the outer ring of the first pawl is provided with a ratchet tooth structure; the end of the ratchet seat is provided with an inner core which is adapted to the structure of the inner wall of the first pawl; an outer ring at one side of the inner core is provided with an arc-shaped barrier strip; an installation seat is formed between the inner core and the arc-shaped barrier strip; the ratchet seat is outwardly clamped with a reversing ring.

An internal tooth type ratchet screwdriver includes a handle and a ratchet head, where the handle is provided with a ratchet seat, a first pawl and a second pawl; the bottom of the ratchet head is outwardly sleeved over the ratchet seat and teeth are formed on an inner wall surface; the first pawl and the second pawl have the same structure; one end of the outer ring of the first pawl is provided with a ratchet tooth structure; the end of the ratchet seat is provided with an inner core which is adapted to the structure of the inner wall of the first pawl; an outer ring at one side of the inner core is provided with an arc-shaped barrier strip; an installation seat is formed between the inner core and the arc-shaped barrier strip; the ratchet seat is outwardly clamped with a reversing ring.

A screwdriver for driving a screw in bone includes a first body configured to engage a tulip of the screw, a first central bore extending through the first body, a second body having a second central bore extending through the second body and an external surface having a spline member positioned at least partially within the cavity, an inner shaft configured to drive a screw into bone and being rotatably coupled with the second body, a spring-biased pawl engageable with the spline member of the second body, a collar rotatable relative to the first body and the second body and having a cammed inner surface, when the collar is rotated in a first direction about the first body, the cammed inner surface pushes the spring-biased pawl into engagement with the spline member to rotatably couple the first body and the second body.