Open-ended wrench, combination wrench, allen wrench, socket wrench, adjustable wrench, pipe wrench, chain wrench, ratcheting wrench, oil filter wrench, and torque wrench.
Most spanners are made of steel which is a mixture of iron and carbon, with small quantities of other elements.
A spanner wrench is a hand-held tool used to help grip and tighten or loosen fasteners. It gives a mechanical advantage in applying torque to turn objects.
A spanner is a type of wrench with an opening and sometimes little teeth so you can get a good grip.
In North American English, wrench is the standard term. The most common shapes are called open-end wrench and box-end wrench. In American English, spanner refers to a specialised wrench with a series of pins or tabs around the circumference.