A large variety of wrenches is made for different uses such as turning cap
screws, bolts, and nuts. The adjustable wrench commonly called a crescent
wrench. The crescent wrench is a general-purpose tool and will not suit every
job. Especially those requiring work in close quarters, crescent wrenches would
never be the best choice. For the safety measures, the wrench should be rotated
toward the movable jaw. It is also take under consideration that it should fit
the nut or bolt tightly. Wrenches are the most running item for every hand tool supplier. The overall length of wrenches in inches determines the size
of the wrenches. Open-end wrenches are best suited to square-headed bolts, and
usually fit two sizes, one on each end. The ends of this type of wrench are
angled so they can be used in close quarters. There is another type of wrench
called as Box wrenches. Box wrenches are also double ended and offset to clear
the user’s hand. The box entirely surrounds the nut or bolt and generally has
12 points so that the wrench can be reset after rotating only a partial turn.
Box wrenches are mostly used on hex-headed bolts; these wrenches have the
advantage of precise fit.