Wera ratcheting wrench open/ box end 5/16" Joker - US sizes, Blue, 144 mm

With an open end on one side and a ratcheting box end
on the other side. With identical sizes on both ends.
Color coded for size. When everything fails, it's time
to play your Joker.
- Open end.
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 this edge will 'bite'
itself into a rounded-off nut, loosening it where others
do nothing but slip-off.
- Box end.
Comes with a very fine 80 tooth ratchet for a small
4.5° return angle. Ratcheting direction is indicated on
both sides.
Size: 5/16".
Overall length: 144mm.