多功能扳手 / multifunction spanner

This is a spanner which is suitable for both hexagon socket head cap screw and parts of screws in different gauges are combined with each other to form a whole, when you need to use it,you need only press it onto the screw directly,then the appropriate part will inosculate with the screw and other parts will retract, each of parts can be pull out to use when the screw is in a narrow palce,there is an one-way card locked shoot in each part of spanner,it prevents the part from retracting when being used.every part is magnetic,This spanner can be also mix--wise used with other manual drive spanners or electric equipments.