Technician A says a box-end wrench provides the best grip on a hex head fastener. Technician B says an open-end wrench provides the best grip on a square head fastener. Who is correct?

Question

Quizplus · Accepted Answer

A box-end wrench provides the best grip on a hex head fastener because it fits snugly around the fastener and applies force evenly. An open-end wrench provides the best grip on a square head fastener because it has two parallel jaws that fit around the fastener and apply force evenly.

Technician a Says a Box-End Wrench Provides the Best Grip