Go by the largest nut you need to turn. As a guide from wrenches on this page, a 150mm wrench opens to 19mm, a 200mm to 24mm, a 250mm to 30mm and a 300mm to 36mm. Lengths run from 100mm to 600mm, and a 3 piece set covering 150mm to 250mm or a 4 piece set covering 150mm to 300mm suits a general toolkit.
An adjustable wrench has smooth parallel jaws for hexagon nuts and bolt heads. A pipe wrench has serrated jaws that bite harder as you pull, made for gripping round pipe, bar and threaded fittings, and it will mark the surface. Use the Pipe Wrenches section for pipework and the Adjustable Wrenches section for nuts and plated fittings.
Check the jaw capacity against the outside diameter of the pipe. Capacities listed on this page include 9-38mm, 13-50mm, 13-75mm and 13-100mm, and lengths run from 175mm up to 900mm and 915mm. A longer wrench has a wider jaw and gives more leverage, so step up in length as the pipe gets larger.
Cup-type oil filter wrenches are sized by diameter and number of flutes, so measure the filter cap and count its flats. Examples here include 36mm with 6 flutes and 84mm with 14 flutes, on 3/8 or 1/2 inch square drive. Strap wrenches and a 60-195mm chain wrench are also listed and adjust to a range of filter sizes.
A pliers wrench has smooth parallel jaws that close squarely on the flats of a nut and adjust quickly like water pump pliers, so it grips plated or soft fittings without marking them. KNIPEX pliers wrenches are listed here in 150mm, 180mm and 250mm lengths, including a VDE insulated 250mm version and a 3 piece set.
A hook wrench, also called a C spanner, has a curved arm with a hook or pin that engages a slot or hole in a round locking ring or collar, such as those on machine spindles and bearings. Sizes here include 19-51mm, 32-76mm and 51-121mm, with sets covering 19-121mm in total.
Wrenches
This category covers adjustable wrenches and pipe wrenches for plumbing, maintenance and general workshop use. Adjustable Wrenches lists single wrenches and sets from 100mm to 600mm, including soft grip, reversible and extra-wide jaw versions, along with adjustable basin wrenches and hook wrenches. Pipe Wrenches covers adjustable pipe wrenches in lengths up to 915mm for gripping round pipe, bar and fittings.
Brands include Draper, Sealey and Sykes Pickavant. For adjustable wrenches, compare overall length and maximum jaw opening, as a longer wrench gives more leverage while an extra-wide jaw covers larger nuts. For pipe work, select a pipe wrench with enough capacity for the pipe diameter, and use a basin wrench for tap nuts in confined spaces behind basins and sinks.
Go by the largest nut you need to turn. As a guide from wrenches on this page, a 150mm wrench opens to 19mm, a 200mm to 24mm, a 250mm to 30mm and a 300mm to 36mm. Lengths run from 100mm to 600mm, and a 3 piece set covering 150mm to 250mm or a 4 piece set covering 150mm to 300mm suits a general toolkit.
An adjustable wrench has smooth parallel jaws for hexagon nuts and bolt heads. A pipe wrench has serrated jaws that bite harder as you pull, made for gripping round pipe, bar and threaded fittings, and it will mark the surface. Use the Pipe Wrenches section for pipework and the Adjustable Wrenches section for nuts and plated fittings.
Check the jaw capacity against the outside diameter of the pipe. Capacities listed on this page include 9-38mm, 13-50mm, 13-75mm and 13-100mm, and lengths run from 175mm up to 900mm and 915mm. A longer wrench has a wider jaw and gives more leverage, so step up in length as the pipe gets larger.
Cup-type oil filter wrenches are sized by diameter and number of flutes, so measure the filter cap and count its flats. Examples here include 36mm with 6 flutes and 84mm with 14 flutes, on 3/8 or 1/2 inch square drive. Strap wrenches and a 60-195mm chain wrench are also listed and adjust to a range of filter sizes.
A pliers wrench has smooth parallel jaws that close squarely on the flats of a nut and adjust quickly like water pump pliers, so it grips plated or soft fittings without marking them. KNIPEX pliers wrenches are listed here in 150mm, 180mm and 250mm lengths, including a VDE insulated 250mm version and a 3 piece set.
A hook wrench, also called a C spanner, has a curved arm with a hook or pin that engages a slot or hole in a round locking ring or collar, such as those on machine spindles and bearings. Sizes here include 19-51mm, 32-76mm and 51-121mm, with sets covering 19-121mm in total.
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