Bionic Stud Wrench
The Bionic Stud Wrench adjusts easily by squeezing and turning the wrench - no more guessing which size spanner you need for a particular stud.
It distributes equal pressure on all sides of the stud to make studding up and unstudding a breeze. Easy on your knuckles, it will not slip or damage your studs.
Corrosion resistant, with double thickness cushioned grips for comfort.