Attachment part for a power tool and a tool assemby

An attachment part (100, 200, 300) for a power tool, which attachment part comprises; an elongate housing (110, 210, 310) including an upper housing part (111, 211, 311), a lower housing part (112, 212, 312) and interconnection means for interconnecting said upper and lower housing parts. An input gear (131, 231, 331) for connection to an output shaft of a power tool, is arranged at a first end (113, 213, 313) of the housing. An output gear (132, 232, 332) with an output interface (132a, 232a), is arranged at a second end (114, 214, 314) of the housing. The interconnecting means comprises a sleeve member (140, 240, 340) extending through a first central bore (117, 217, 317) at the first end of the upper housing part, which sleeve member receives the input gear; and a fixation member (150, 250, 350) extending through a second central bore (118, 218, 318) at the first end of the lower housing part and which is arranged to be secured to the sleeve member for clamping the upper and lower housing parts. A tool assembly comprising a power tool and an attachment part according to the foregoing.