Abstract: A screwdriver for an inherent tool bit set includes a screwdriver device, a cover member and at least one control set. The screwdriver device has an accommodating portion at one end. A plurality of accommodating rooms is formed on the accommodating portion for receiving a tool bit set. At least one spring room is deposited on the accommodating portion. The screwdriver device has a working shaft at another end. The cover member has a receiving space. At least one through hole is opened on the cover member. The through hole corresponds to the spring room. The control set is assembled between the spring room and the through hole. Thus, a user presses the control set into the spring rooms for separating the cover member from the screwdriver device and takes a tool bit to assemble to the working shaft for screwing or loosing bolts.

Abstract: A receiving device for tool bits includes a receiving body, at least one receiving space defined on one end of the receiving body, each receiving space having a plurality of first protrusions adequately located therein, each of the receiving space having a plurality of position spaces separated by the first protrusions, the position space having two pairs of fourth protrusions abutting against the periphery of the tool bit so that the tool bit is positioned at the position space and would not drop down from the position space.

Abstract: A receiving device for tool bits includes a receiving body, at least one receiving space defined on one end of the receiving body, each receiving space having a plurality of first protrusions adequately located therein, each of the receiving space having a plurality of position spaces separated by the first protrusions, the position space having two pairs of fourth protrusions abutting against the periphery of the tool bit so that the tool bit is positioned at the position space and would not drop down from the position space.

Abstract: A toolbox with a hinge device having a first shell and a second shell includes a first opening defined in the first shell and a second opening defined in the second shell. Two first protrusions are respectively formed on two opposite lateral surfaces of the first opening. Two second protrusions are respectively formed on two opposite lateral surfaces of the second opening. A hinge member is pivotally accommodated in the first and second opening. The hinge member has two pairs of grooves respectively defined in two ends thereof for correspondingly and pivotally engaging with the two first protrusions and the two second protrusions.

Abstract: An apparatus for coloring a recognizable tool bit includes an operating system and a control system electrically connected to the operating system. The operating system has a rotating mechanism having a rotor extending therefrom for adapting to connect to a tool bit. A supplying mechanism is provided for adapting to store dyestuffs and inject the dyestuffs for coloring the tool bit. A daubing mechanism is relatively connected to the supplying mechanism for soaking dyestuffs from the supplying mechanism and daubing the dyestuff on the tool bit.

Abstract: A screwdriver for an inherent tool bit set includes a screwdriver device, a cover member and a control set. The screwdriver device has an accommodating portion at one end. Accommodating rooms are formed on the accommodating portion for receiving a tool bit set. Two spring rooms are deposited on the accommodating portion. The screwdriver device has a working shaft at another end. A cover member has a receiving space at one end for receiving the accommodating portion. Two through holes are opened on the cover member. The through hole is communicated with the receiving space and corresponding to the spring room. Two control sets are assembled between the spring room and the through hole. Thus, a user presses the control sets into the spring rooms for separating the cover member from the screwdriver device and takes a tool bit to assemble to the working shaft for screwing or loosing bolts.

Abstract: An adjustable structure for a hand tool includes a handle, a shank connected with the handle, and an adjusting device mounted on the handle. The handle has a chamber defined therein and two protrusions extending therefrom. The shank has at least two clamping grooves annularly defined therein. The adjusting device includes a rotary element, two slidable elements and two springs. The rotary element has a through hole defined therein, such that the shank passes through the through hole. Two sliding channels are defined in the rotary element. Each sliding channel receives one slidable element and one spring. Each slidable element has a clamping surface formed thereon for engaging with the clamping groove. Each slidable element has an abutting slot defined therein and receiving the protrusion. The shank is adjustable by moving the desired clamping groove to selectively engage with the two slidable elements.

Abstract: An adjustable structure for a hand tool includes a handle, a shank connected with the handle, and an adjusting device mounted on the handle. The handle has a chamber defined therein and two protrusions extending therefrom. The shank has at least two clamping grooves annularly defined therein. The adjusting device includes a rotary element, two slidable elements and two springs. The rotary element has a through hole defined therein, such that the shank passes through the through hole. Two sliding channels are defined in the rotary element. Each sliding channel receives one slidable element and one spring. Each slidable element has a clamping surface formed thereon for engaging with the clamping groove. Each slidable element has an abutting slot defined therein and receiving the protrusion. The shank is adjustable by moving the desired clamping groove to selectively engage with the two slidable elements.

Abstract: A method for coloring a recognizable tool bit comprises: positioning step: a tool bit positioned on a rotating means; setting step: adjusting a flow rate of a daubing means for deciding a thickness of a colored layer of the tool bit; daubing step: the daubing means having a brush to paint the tool bit, the rotating mechanism rotating the tool bit for annularly coloring on an outer periphery of the tool bit; execution step: an operator only pedaling a pedal-typed switch to start or to stop coloring the tool bit such that the operator can further use two hands to position the next tool bit or to collect finished tool bits sequentially; removing step: detaching the colored tool bit from the rotating means.

Abstract: An apparatus for coloring a recognizable tool bit includes an operating system and a control system electrically connected to the operating system. The operating system has a rotating mechanism having a rotor extending therefrom for adapting to connect to a tool bit. A supplying mechanism is provided for adapting to store dyestuffs and inject the dyestuffs for coloring the tool bit. A daubing mechanism is relatively connected to the supplying mechanism for soaking dyestuffs from the supplying mechanism and daubing the dyestuff on the tool bit.

Abstract: A hinge device for a toolbox having a first shell and a second shell includes a first opening defined in the first shell and a second opening defined in the second shell. Two first protrusions are respectively formed on two opposite lateral surfaces of the first opening. Two second protrusions are respectively formed on two opposite lateral surfaces of the second opening. A hinge member is pivotally accommodated in the first and second opening. The hinge member has two pairs of grooves respectively defined in two ends thereof for correspondingly and pivotally engaging with the two first protrusions and the two second protrusions.