A cartridge tool set comprising a body having a joint portion at each end of the body, the joint portion having a screw hole axially recessed on the end face of the joint portion, the screw hole having a screw surface formed on the inner surface of the screw hole; and a tool portion detachably connected to a tool member.

A cartridge tool set comprising a body having a joint portion at each end of the body, the joint portion having a screw hole axially recessed on the end face of the joint portion, the screw hole having a screw surface formed on the inner surface of the screw hole; and a tool portion detachably connected to a tool member.

A belt buckle adapted for securing a plurality of tools. The multi-purpose belt buckle system includes a first component for screwing a screw and a second component for holding the first component. The first component is T-shaped and includes various types of screwdriver heads. The second component further includes a slot for holding the first component, at least one open wrench and least one means for connecting a strap/lace.

A belt buckle adapted for securing a plurality of tools. The multi-purpose belt buckle system includes a first component for screwing a screw and a second component for holding the first component. The first component is T-shaped and includes various types of screwdriver heads. The second component further includes a slot for holding the first component, at least one open wrench and least one means for connecting a strap/lace.

A solid state tool system includes a first solid state tool, a second solid state tool, and a third solid state tool. In a first mode, the first solid state tool, the second solid state tool, and the third solid state tool are coupled to one another in a storage configuration. In a second mode, the first solid state tool is used as a tool by itself. In a third mode, the second solid state tool is used as a tool by itself. In a fourth mode, the third solid state tool is used as a tool by itself. In a fifth mode, the first solid state tool is coupled to the third solid state tool and used as a first combination tool. In a sixth mode, the second solid state tool is coupled to the third solid state tool and used as a second combination tool.

A solid state tool system includes a first solid state tool, a second solid state tool, and a third solid state tool. In a first mode, the first solid state tool, the second solid state tool, and the third solid state tool are coupled to one another in a storage configuration. In a second mode, the first solid state tool is used as a tool by itself. In a third mode, the second solid state tool is used as a tool by itself. In a fourth mode, the third solid state tool is used as a tool by itself. In a fifth mode, the first solid state tool is coupled to the third solid state tool and used as a first combination tool. In a sixth mode, the second solid state tool is coupled to the third solid state tool and used as a second combination tool.

The screwing accessory device comprises a receiving box, a rack and a pushing component. The receiving box is for receiving the screwed component. The rack is connected to the receiving box. The pushing component is disposed within the receiving box and is used for pushing the screwed component.

The screwing accessory device comprises a receiving box, a rack and a pushing component. The receiving box is for receiving the screwed component. The rack is connected to the receiving box. The pushing component is disposed within the receiving box and is used for pushing the screwed component.

A ratcheting or non-ratcheting bit driver with a bit storage or “cartridge” that fits in the hollow portion of the driver handle. The bit storage or “cartridge” enables access to bits from both ends of all bits at a perpendicular orientation to the main axis of the handle while contained within the handle. The device remains in one piece rather than separating the assembly into two pieces, a handle and a cartridge during use.

A screwdriver includes a shank having a driving end and a connection end which is fixed to a handle. The handle has a core portion which is mounted to the connection end of the shank by way of injection molding. Multiple first portions and multiple second portions are alternatively attached to the outside of the core portion. The first portions are made of material that is softer than that of the second portions so as to provide comfortable grasp to the user's hand.