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An adjustable spanner (UK and most other English-speaking countries), also called a shifting spanner (Australia and New Zealand) [1] or adjustable wrench (US and Canada), [a] is any of various styles of spanner (wrench) with a movable jaw, allowing it to be used with different sizes of fastener head (nut, bolt, etc.) rather than just one fastener size, as with a conventional fixed spanner.
In South Africa, the terms "bobbejaan spanner" and "baboon spanner" are commonly used, [6] especially for large pipe wrenches. Bobbejaan is the Afrikaans term for a baboon. In Spain and Morocco, they are called grifa. In Mexico they are known and called "stillson" without even using the word llave ("wrench"). In Turkey they are known as ...
A wrench or spanner is a tool used to provide grip and mechanical advantage in applying torque to turn objects—usually rotary fasteners, such as nuts and bolts—or keep them from turning. In the UK, Ireland, Australia, and New Zealand spanner is the standard term. The most common shapes are called open-ended spanner and ring spanner.
Monkey wrenches are still manufactured and are used for some heavy tasks, but they have otherwise been mostly replaced by the shifting adjustable wrench/spanner, which is much lighter and has a smaller head, allowing it to fit more easily into tight spaces, and the tooth-jawed, torque-gripping pipe wrench.
A click torque wrench. A torque wrench is a tool used to apply a specific torque to a fastener such as a nut, bolt, or lag screw.It is usually in the form of a socket wrench with an indicating scale, or an internal mechanism which will indicate (as by 'clicking', a specific movement of the tool handle in relation to the tool head) when a specified (adjustable) torque value has been reached ...
The first products that were developed according to ergonomic principles were the screwdrivers (1983), the adjustable wrenches (1984), wood chisels (1985) and slip-joint pliers (1986). In 1996, the Bahco Ergo concept was presented and scientifically approved as a way of preventing repetitive strain injuries and to increase productivity.
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Johan Petter Johansson (December 12, 1853 – August 25, 1943), sometimes known as JP, was a Swedish inventor and industrialist.He invented a modern adjustable spanner [1] (patents in 1891 and 11 May 1892).