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Combination wrenches

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Combined keys, long version 8

Combined keys, long version 8

€3.21 +VAT
RON 15.85
  • EAN: 3838909003597
  • Manufacturer: UNIOR
  • Manufacturer Code: 600359
  • Production country: SI
Supplier:
UN
Unior Tepid srl
verified supplier
Response time: usually up to 1 day
Combined keys, long version 12

Combined keys, long version 12

€4.37 +VAT
RON 21.58
  • EAN: 3838909003634
  • Manufacturer: UNIOR
  • Manufacturer Code: 600363
  • Production country: SI
Supplier:
UN
Unior Tepid srl
verified supplier
Response time: usually up to 1 day
Combined keys, long version 21

Combined keys, long version 21

€7.22 +VAT
RON 35.67
  • EAN: 3838909003726
  • Manufacturer: UNIOR
  • Manufacturer Code: 600372
  • Production country: SI
Supplier:
UN
Unior Tepid srl
verified supplier
Response time: usually up to 1 day
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Combination wrenches

Combination wrenches are a 2-sided variety of open-end wrenches. These tools are used to tighten or loosen bolted connections with a large range of dimensions and strengths. They are used for hexagon socket head screws and hexagon nuts.

Open-end wrench design

Open-end wrenches are uniform in material. They consist of 2 working parts, i.e. a jaw and an eyelet, with a handle in between. The jaws are set at an angle of 15° to the axis of the wrench and the ring is set at the same angle (15°) to its flat face. The internal profile of the eyelets is twofold: 6-angled and 12-angled. Both profiles can be geometrically modified, thus increasing the lifespan of the wrench and the nut and bolt head. They eliminate angular stress and distribute the tool pressure over a larger drive area of the threaded connection. The jaws of open-end wrenches are also modified by optimised geometry, e.g. their side edges are rounded off and their thickness reduced. One important variation of combination wrenches is offset ring wrenches.

Blade wrenches are made of chrome vanadium steel (CrV) using forging, heat treatment and machining technologies. The manufacturing standards are defined by ISO 691, ISO 7738, ISO 3318, ISO 1711-1 and DIN 3113. Their metric size range is 5.5-30 mm and their inch size range is 3". The tools are either satin chrome plated or chrome plated and polished. This makes them well protected against corrosion and pleasant to the hand.

Types of combination wrenches

Combination wrenches are available in two basic versions: standard and offset.

Main characteristics of combination wrenches

The technical characteristics of combination wrenches are: size (jaw width, inner ring diameter, mm or inch), outer ring diameter (mm), overall length (mm), working head thickness (mm), working head height and overall weight (g).

Applications for combination wrenches

Open-end wrenches are used in industry (e.g. vehicle and machine assembly plants), industrial services (maintenance departments), construction and crafts, service and mechanical workshops, including car repair shops. They are manufactured by e.g. Bahco, Beta, Facom, Gedore, Hazet, Proxxon, Snap-on, Stanley, Stahlwille etc.