The round head of the combination wrench fits very securely around a bolt or nut head of the appropriate size, thus making it easy to apply extreme torque on all side equally. These wrenches are for undoing nuts or bolts that are very tight or have rusted. Once a little loose, the flat, two sided end is easier to use.
For removing fasteners at a faster rate by using a ratcheting wrench as opposed to the traditional combination wrench which requires you to remove the wrench and reposition it after the range if motion has been reached.
A combination wrench is a tool that has two ends used to loosen or tighten a nut or bolt. One end typically has the appearance of a U or open jaw, the other end is a close circle with grooves that operates similar to a socket wrench.
A combination wrench has an open end on one end and a box end on the other. The 18mm designates what size nut/bolt the wrench fits.
I believe a striking wrench is a combination adjustable/hammer type of wrench used in the mining industry. I have one on hand in my tool box if you want a pic, I'll be glad to take one for you or simply look at the picture in the related link.
A 'combination' wrench has a flat end and a round end. The round end is used to release very tight nuts (for instance the nuts the hold springs or shocks on cars) -Once they are loosened it's easier to turn them with the flat end.
You can purchase a combination wrench set online from stores such as Sears. Alternatively, you can purchase this item from retailers such as Amazon and Grainger.
A wrench is a tool used to turn a bolt or nut.
A monkey wrench is used much the same as an adjustable wrench. The original tool kit that came with a Model T or Model A Ford included a monkey wrench.
lug wrench
A torque wrench should not be used on any hitch type.
Line wrench
A pipe wrench, or an adjustable wrench, is used for any job which requires being able to adjust the wrench after inserting it into a tight or confined space, such as when attaching pieces of pipe together near a wall.