Frequently asked questions

To cut steel wire, diagonal cutters are best; the precision mechanic's diagonal cutters (order no. 36189) are better, for instance. Electronics pliers are more suitable for cutting soft to medium-hard wires.

Above all, burr-free cutting is important to prevent a potential risk of injury. If the cable tie tail is not cleanly cut, painful scratches or cuts may result. To ensure the clean, flush cutting of cable tie tails, precision mechanic's diagonal cutters are especially suitable. (Order no. 36189). Thanks to their specially milled precision cutting edge, cable ties and soft and medium-hard wires can be cut flush.

A bevelled edge or outer cutting bezel serves to ensure the stability of the cutting edge in terms of damage through increasing the cutting angle.

A cutting edge with bevelled edge generally has a significantly higher cutting angle (with Wiha approx. 76°). Nevertheless, this means that the user requires more cutting strength as soon as the cutting angle is increased. If a hard wire is cut using a cutting edge without bevelled edge, however, the cutting edge is unlikely to withstand the force and will become deformed. This is why cutting edges without bevelled edge are predominantly used in electronics (cutting copper or aluminium wires), or by plastic cutters.


Stripping is used to describe the removal of the outer sheath of a cable or installation cable. The outer sheath is removed using a cable stripping knife or stripping pliers. The individual wires are therefore left exposed.

Skinning is the procedure used to remove part of the insulation sheath of an electrical conductor to a specific length required for connection.


Laut den Normen DIN und ISO lautet die korrekte Bezeichnung für das Werkzeug Schraubendreher. Dennoch konnte diese Bezeichnung sich im allgemeinen Sprachgebrauch bis heute nicht durchsetzen. Stattdessen wird immer noch der Begriff Schraubenzieher verwendet, der seinen Ursprung durch das Ein-bzw. Festziehen einer Holzschraube im Holz hat.

As a general principle, a screwdriver needs to capable of fastening a screw!

But if you want to know if a screwdriver is really good, you should look our for the following:

1. Quality: Does the blade rust? Does the handle feel “good” or does the hand start to hurt after just a few uses?

2. Fit: Does the screwdriver optimally fit the screw? Does it fit in my hand?

3. Service life: Is the screwdriver capable of surviving the odd knock? Can I still rely on my screwdriver after a few months or is it already broken?

Is the plastic resistant to oil?

Screwdrivers also need to suit their application fields! An electrician's screwdriver must not conduct electricity! An electronics screwdriver must not destroy the board through the static charge of the technician. A screwdriver can’t slip out of the hand, even in oily or damp application fields.

Standard Phillips screwdrivers are characterised by a Pozidriv or Phillips drive, which can be associated with a corresponding screw profile.

The profile of a Phillips screw is made up of two perpendicular crossed slotted profiles. Compared to the classic slotted form, the screw properties are significantly improved, since the force application takes place at a total of four edges.

The profile of the Pozidriv screw can be seen as a further development of the Phillips screw profile. The user benefits from an additional cross, which is offset to the first cross by 45°. The additional cross is narrower and has a smaller depth, yet ensures extra stability and more winding surface.

In application, the Pozidriv profile must not be confused with the Phillips profile, since this will lead to extremely rapid wear of the fastening tool and screw.


Wiha slimTECHNOLOGY permits blades to be up to 33% slimmer by means of integrated insulation. Low-lying screw and spring elements in the critical working area can therefore be reached easily. The high-quality blade insulation ensures safe work on live parts up to 1,000 V AC/1,500 V DC. Additional safety is provided by the fact that every single screwdriver is tested in a water bath.

Screw contact is the term for the moment in which the screw head touches the work piece for the first time; in other words, the underside of the screw head comes into contact with the work piece.

The key width defines the distance (mm) between two parallel surfaces, and thus determines the size of the L-key.

Zuerst einmal ist die Auswahl des richtigen Schraubendrehers entscheidend. Für eine Kreuzschlitz-Schraube sollte zwingend ein Kreuzschlitz (Phillips)-Schraubendreher verwendet werden und keinesfalls ein Schlitz-Schraubendreher. So kann die Kraft besser auf die Schraube übertragen werden. Auch die Wahl der richtigen Schraubendrehergröße ist zu beachten: Ist der Schraubendreher zu klein findet er keinen Halt und schlägt den Kreuzschlitz aus; ist der Schraubendreher zu groß kann er im Kreuz nicht richtig greifen. Wenn Sie den passenden Schraubendreher ausgewählt haben ziehen Sie die Schraube mit Gefühl an.

Complete safety for the user is a paramount concern of Wiha when it comes to work on live parts. This is why Wiha complies with a wide range of standards and regulations, such as DIN EN 60900 for insulated hand tools.

In Germany and some other countries, there are stringent rules and regulations regarding work on live parts. It is only permitted to take place in special safety conditions. DIN EN I60900 is an international standard met by Wiha and their hand tools. Working under voltage should generally be avoided. Nevertheless, every single VDE tool manufactured by Wiha is individually tested for safety. After extensive testing, the tools are approved by our quality assurance. No tool leaves the company without being tested.

Wiha tests all VDE tools at 10,000 volts. This guarantees safe work up to 1,000 volts DC and 1,500 AC. In addition to individual piece testing, batch testing is carried out in the laboratory. Here, a range of features are inspected and assessed, including the durability of labels, checking combustion behaviour and holding force. Another voltage test is also carried out, in which the products are previously damaged in a water bath or heat chamber. Only if these tests are passed is the batch approved.

The VDE office awards the VDE mark for insulated hand tools (Verband Deutscher Elektroingenieure – Association for Electrical, Electronic & Information Technologies). Wiha therefore regularly sends products to the VDE office for testing and approval if the standards and regulations are observed. After approval, the VDE certificate is valid for five years. In addition to the testing carried out by VDE, a manufacturing site inspection takes place once per year. This is done to check whether the test regulations are being met in production and the laboratory.

2016 ist Wiha der Verhaltensrichtlinie "Code of Conduct" des Bundesverbandes Materialwirtschaft, Einkauf und Logistik beigetreten. Ziel ist dabei die Verankerung ethischer Grundsätze wie Integrität, Fairness und unternehmerische Verantwortung.

Wiha setzt sich dabei zur Einhaltung der folgenden Grundsätze bei seinen Lieferanten ein:

- Korruption verhindern

- Fairen Wettbewerb fördern

- Umweltschutz stärken

- Gesundheitsschutz und Sicherheit gewährleisten

- Menschenrechte schützen

- Diskriminierung unterbinden

Alle Informationen dazu auch hier:

With the hexagon L-keys, we make a distinction between brilliant chrome and matt chrome surface coatings. When it comes to TORX® profiles, L-keys have a manganese phosphate or titanium silver surface.

The matt chrome-plated surface offers ideal corrosion protection. The brilliant chrome-plated hexagon L-keys, on the other hand, boast a smooth surface, which provides less surface for rust and is therefore even more resistant to corrosion.

There is also a coloured version. The eye-catching colour serves to enable the quick identification of key widths and the location of the L-keys when lost in the machine, for instance.

For ideal corrosion protection, manganese phosphate L-keys are oiled after curing. L-keys with titanium silver coating are not. This makes oily fingers or re-oiling L-keys to maintain the corrosion protection a thing of the past.


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