Chromium-vanadium steel(Cr-V) It has better strength and toughness than carbon steel, so it is a great material for high quality tools. Unlike stainless steel- it’s easy to sharpen by hand so you can keep things sharp at home without special equipment. Chrome and vanadium steel is too general.

Most types of spanner are made using the drop forging process. Steel rods are cut into short lengths, called billets, and each one is passed through an induction heating coil which uses electromagnetism to heat the metal to about 1000 degrees Celsius. The upper die drops onto the billet, forcing it into shape.

Chromium-vanadium steel(Cr-V) Commonly used for wrenches, screwdrivers, manual sleeves generally use 50BV30 chrome vanadium steel.

Most spanners are alloy steel that is quench hardened and tempered or austempered. These would have low corrosion resistance without a surface treatment.

1. The spanner is a hand-held tool used to provide grip and tighten or loosen fasteners. It gives a mechanical advantage in applying torque to turn objects. The tool is used in turning rotary fasteners like nuts and bolts.

‘Spanner’ came into use in the 1630s, referring to the tool for winding the spring of a wheel-lock firearm. From German Spanner (n.), from spannen (v.) (“to join, fasten, extend, connect”), from Proto-Germanic *spannan, from PIE root *(s)pen- (“to draw, stretch, spin”).

(Britain, Ireland, mildly derogatory) A stupid or unintelligent person; one prone to making mistakes, especially in language. You spanner, Rodney!

sofa

There are two common spellings of the dessert; doughnut and donut. The former is considered the UK spelling and the latter the Americanised version. Often Americanisms drop the ‘u’, for example in colour versus color. Dictionary.com lists doughnut as the primary spelling, with donut as an alternative.

biscuits

The word biscuit derives from the Latin bis, meaning twice, and coctus, meaning cooked. The term came into use in 14th century England to describe a confection that is baked and then dried out, to produce a hard, flat item that goes soft over time and delicious when dipped in a cup of tea.

Most people in the UK call it “rocket” which is an anglicisation of the French “roquette” because we got it from the French whilst you got it from the Italians. Its proper name is Eruca Sativa.

courgette

Arugula’s distinctive and peppery flavor adds flair to a variety of cold dishes, as well as salads. Its overall nutritional value is generally lower than some of the other green leafy vegetables, but it does combine well with its leafy cohorts spinach and kale.