We saw one of these the other day while out
picking up some light bulbs oogling tools. It’s a regular wrench in most respects, except that it has teeth on the open end. Ok, more like baby teeth. Ok, really they look more like nubs.
They’re called Wright Grip, and the manufacturer says that the teeth deliver more torque while “increasing tool life and strength.” Wright has incorporated the “Grip” design into all their open ended wrenches, which they say provides 50% more strength and “longer service life” than traditional open-end wrenches with no increase in the tool’s outside dimensions of the wrench head.
It looks like it might grip well, though the teeth might shred the fastener if you’re not careful. Still, any extra gripping power is welcome. And as we all know: With great power comes great responsibility.
The cost is a bit on the high side at $100 for a set of four or six wrenches.
Wright Grip [Wright Tools]