Some screwdrivers have a short hexagonal section at the top of the blade, adjacent to the handle, so that a ring spanner or open wrench can be used to increase the applied torque.
2.
Another innovation by a Malaysian which won special awards was the " Yapanner ", an adjustable ring spanner, invented by Mr Yap Wang Han, vice-chairman of Techvation Sdn Bhd.
3.
A "'peanut butter wrench "', also known as a "'crank bolt spanner "'or a "'crank spanner "', is a single-ended box wrench or ring spanner used in cycling to tighten older 14 mm and 15 mm crank bolts, or the wheel nuts ( track nuts ) on hubs with solid axles commonly found on track bicycles, particularly the 15 mm wrench made by Campagnolo.
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