Abstract: A detachable tool assembly for a screwdriver may include a main body, a sleeve, an extending tube, a first controlling piece, a second controlling piece, an operating unit, and at least a tool rod. The extending tube can be rotated round the main body, so the user can hold the extending tube by hand to provide support when screwing process. Also, it is convenient for user to replace the tool head, while the user has no need to use two hands to remove or place the tool heads, but one hand holding the handle rotates the operating unit to achieve the replacing process.

Abstract: A detachable tool assembly for a screwdriver may include a main body, a sleeve, an extending tube, a first controlling piece, a second controlling piece, an operating unit, and at least a tool rod. The extending tube can be rotated round the main body, so the user can hold the extending tube by hand to provide support when screwing process. Also, it is convenient for user to replace the tool head, while the user has no need to use two hands to remove or place the tool heads, but one hand holding the handle rotates the operating unit to achieve the replacing process.