The Joker has a non-angled 12-point beak, therefore it

requires just 30° of working space, otherwise it functions

just like a regular open end wrench. The dark metal plate

dual functions as a retainer, preventing the nut to slip

through the wrench beak or it holds the nut. 30° further

the metal retainer plate allows the nut to slide through, or

grip it since the metal plate is equipped with a hardened

ragged edge. The teeth of his edge will 'bite' itself into

a rounded-off nut, loosening it where others do nothing

but slip-off. Color coded for size.

Size: 10mm/13mm.

Overall length: 167mm.