USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 1
FITTING OPEN-END WRENCH.
USE OF OPEN-END WRENCH.
There are times, however, when the only way you can move the wrench is by
pushing it. In this case, do not wrap your fingers around it. Push it with
the palm of your hand and hold your hand open.
(2) Box Wrench. Always select the size wrench that fits the nut or
Box wrenches will not slip off and are used in preference to
open-end wrenches. A swing through an arc of 15 degrees is sufficient to
continuously loosen or tighten a nut or bolt. Unless there is room to swing
a box Wrench in a full circle, lift it completely off the