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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.
There are two main types of tap wrenches: double-end adjustable wrenches and T-handle wrenches. Double-end adjustable wrenches, also known as bar wrenches, have one threaded handle which is attached to one of the clamps. The clamp is opened to insert the tool and then tightened down against the tool to secure it. This type of tap wrench is used ...
The adjustable end wrench differs from the monkey wrench in that the gripping faces of the jaws are displaced to a (typically) 15 degree angle relative to the tool's handle, a design feature that facilitates the wrench's use in close quarters. The modern adjustable end wrench was invented by Johan Petter Johansson [6] of Bahco.
Crescent is a brand of hand tools.It originated with the Crescent Tool Company, founded in 1907.The Crescent brand has changed ownership multiple times. It is currently owned by Apex Tool Group, LLC of Sparks, Maryland as part of its Hand Tools division.
Its pliers have distinctive sky-blue handle grips; the company has been using the same trademarked shade of blue since 1956. [3] It also produces cutting pliers, linemen's pliers, long nose pliers, adjustable wrenches, screwdrivers, nutdrivers and special-purpose pliers, as well as multi-function tools for the fire service and other first ...
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.