| 摘要 |
A tool comprises a handle including a pivotal end, a holding end held by user in use of the tool and a plurality of teeth formed on an outer periphery of the pivotal end; a first working head including a pivotal end coupled to the pivotal end pivotally, a working end engaged with a work piece desired to be driven and an aperture between the pivotal end and the working end; and a positioning unit including a positioning plate and an elastic element received in the aperture, with the positioning plate hooking the first working head and pressing the elastic element of the positioning unit respectively, with a restricted portion protruding from of the positioning plate between two ends of the positioning plate toward the pivotal end |
