Barlow & Barlow
Foldable cross wrench
 The foldable cross wrench has four wrench members pivoted to a coupling member the wrench members can be stretched into a cross shape, and secured in stretched position by a cap member which is provided with keys to engage with key ways on the wrench members. When the wrench is not used, the cap member is rotated to a position where the keys are not engaged with the key ways on wrench members so that the wrench members can be pivoted to a folded position. 
B B
B25B B25B
inventional inventional
Chung-Hsing
Chang