A quick-release device for screwdriver bit includes a shank having a polygonal hole longitudinally defined in one end thereof and adapted for partially receiving a bit. At least one slot is longitudinally defined in the shank. An annular groove is defined in an inner periphery of the polygonal hole and communicates with the at least one slot, wherein the annular groove is formed with a tapered section toward the first end of the shank. An expandable limit element is received in the annular groove. A sleeve is movably sleeved on the shank. The sleeve has at least one protrusion inwardly extending therefrom and engaged into the at least one slot and abutting against the limit element when removing the bit form the polygonal hole. A stopper is secured on one end of the shank for preventing the sleeve from removing from the shank.

Devices, systems and methods for holding devices, including tool holders and/or associated apparatus, that can be attached to various driving mechanisms. Various embodiments can include one or more canted, or slanted, coil springs that are capable of forming to various shapes by the application of a controlled force.

Devices, systems and methods for holding devices, including tool holders and/or associated apparatus, that can be attached to various driving mechanisms. Various embodiments can include one or more canted, or slanted, coil springs that are capable of forming to various shapes by the application of a controlled force.

Devices, systems and methods for holding devices, including tool holders and/or associated apparatus, that can be attached to various driving mechanisms. Various embodiments can include one or more canted, or slanted, coil springs that are capable of forming to various shapes by the application of a controlled force.

A sleeve device includes a main unit having a sleeve with an open end face, a receiving space intercommunicating with the open end face, and a radial hole. An engaging member extends into the receiving space. A fixing member is mounted to an end of the receiving space opposite to the open end face. A pressing member is slideably received in the receiving space for pressing against the fixing member. The pressing member includes a cylindrical portion, an abutting portion, and a pressing portion, with the abutting portion and the pressing portion disposed on two ends of the cylindrical portion. A positioning member is slideably received in the radial hole for selectively pressing against an outer periphery of the cylindrical portion or the pressing portion. A ring is rotatably mounted around the sleeve and includes an inner periphery and a first recessed portion for selectively abutting the positioning member.

A sliding sleeve or collar which is cylindrical and has an elongated guide or channel fluidly connecting the outer annular wall with the inner annular wall of the sleeve is disclosed. A connector having at least one open end and an elongated slot with a floor and a pin guide through the floor is further disclosed. The pin guide is open to the inside of the connector. Between the sleeve and the slot is a pin having a pin head visible through the elongated guide and two opposing spring arms of a size and shape to fit in said slot, and a pin body which movable fits inside pin guide.

A twisting sleeve or collar which is cylindrical and has an elongated guide or channel fluidly connecting the outer annular wall with the inner annular wall of the sleeve is disclosed. A connector having at least one open end and an elongated slot with a floor and a pin guide through the floor is further disclosed. The pin guide is open to the inside of the connector. Between the sleeve and the slot is a pin, having a pin head visible through the elongated guide, and two opposing spring arms of a size and shape to fit in said slot, and a pin body which movably fits inside pin guide.

A sleeve device includes a main unit having a sleeve with an open end face, a receiving space intercommunicating with the open end face, and a radial hole. An engaging member extends into the receiving space. A fixing member is mounted to an end of the receiving space opposite to the open end face. A pressing member is slideably received in the receiving space for pressing against the fixing member. The pressing member includes a cylindrical portion, an abutting portion, and a pressing portion, with the abutting portion and the pressing portion disposed on two ends of the cylindrical portion. A positioning member is slideably received in the radial hole for selectively pressing against an outer periphery of the cylindrical portion or the pressing portion. A ring is rotatably mounted around the sleeve and includes an inner periphery and a first recessed portion for selectively abutting the positioning member.

A quick-release device for screwdriver bit includes a shank having a polygonal hole longitudinally defined in one end thereof and adapted for partially receiving a bit. At least one slot is longitudinally defined in the shank. An annular groove is defined in an inner periphery of the polygonal hole and communicates with the at least one slot, wherein the annular groove is formed with a tapered section toward the first end of the shank. An expandable limit element is received in the annular groove. A sleeve is movably sleeved on the shank. The sleeve has at least one protrusion inwardly extending therefrom and engaged into the at least one slot and abutting against the limit element when removing the bit form the polygonal hole. A stopper is secured on one end of the shank for preventing the sleeve from removing from the shank.

A sliding sleeve or collar which is cylindrical and has an elongated guide or channel fluidly connecting the outer annular wall with the inner annular wall of the sleeve is disclosed. A connector having at least one open end and an elongated slot with a floor and a pin guide through the floor is further disclosed. The pin guide is open to the inside of the connector. Between the sleeve and the slot is a pin having a pin head visible through the elongated guide and two opposing spring arms of a size and shape to fit in said slot, and a pin body which movable fits inside pin guide.