The variable hexagonal box spanner is the synthesis of the manual screw spanner and the hexagonal box spanner.
可变六角套筒扳手则是对手动螺丝扳手和六角套筒扳手的综合。
The spanner is different, according to the structure may divide into two big kinds, namely manual screw spanner and box spanner.
扳手按照结构的不同主要可以分为两大类，即手动螺丝扳手和套筒扳手。
Convenience : The water chestnut of the screw can fit exactly into this special desighed spanner, which avoids the problem of slipping out as using the normal jack handles.
简便：可以避免一般千斤顶在负载时必需双手操作或摇杆容易脱钩的缺点，配套的扳手与菱角螺杆起着互相固定的作用。
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