One of the mysteries of the English language finally explained.
An L-shaped metal bar with a hexagonal head at each end, used to turn bolts and screws having hexagonal sockets.
- ‘Packing a small adjustable spanner and a set of Allen keys will make sure you can do those last-minute running repairs.’
- ‘However, there are some differences in how the blades are changed, ranging from a hex-head set screw that requires an Allen wrench to a simple flip-lever design that does need a tool.’
- ‘Attaching the back of the chair to the seat took me a good hour, wrestling in equal measure with an Allen key, the various chair components and an over-eager cat given to chasing small parts and hiding screwdrivers.’
- ‘Presumably it arrived in a flat pack with instructions and an Allen key.’
- ‘After much work with an Allen wrench the Wookie tightened the wheel enough to make it catch and then, by holding his tongue the right way and not breathing too much, spliced the rotten wires together.’
1960s: from the name of the manufacturer, the Allen Manufacturing Company, of Hartford, Connecticut.
Allen wrench/ˈalən ˌrenCH/
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