Safety instructions

General information


The use of hand tools requires feel and expertise. Each of the different tools is intended for a specified, limited application. Any use that exceeds the permissible force for a given application can quickly lead to damage of the tool, and thus to accidents. To prevent this, the following basic rules apply:


Check condition before use


Check each tool before each use to make sure it is in perfect condition and free from damage, to guarantee safe operating conditions.


Use tools only for their intended purpose


Consequential damage- and warranty claims (in particular those resulting from tools not used for their intended purpose) are excluded.

Read the instruction manual, if available.
Always handle the tool properly.

If there is a risk of explosion, use spark-resistant tools.
Ensure that the handle is sitting comfortably in your hand and select the hardness of the tool material for the intended use: materials that are too hard tend to splinter or break off, while soft ones tend to deform over time.

Always use the correct tool for each application.
The tool used must never be modified or changed.
Use tools correctly and solely for the purpose for which they are intended.
Tools that are not correctly positioned in the screw profile or above the screw head can slip and thus cause damage or injury.
Clean the tool after each use. Always wear suitable and approved eye protection and safety gloves. Avoid risks to yourself and others by ensuring a safe working environment.
Make sure that no other person is in a danger zone that may result from your intended work. Dispose of defective tools immediately or, if possible, send them back to the manufacturer for repair.


Always keep tools away from children.
Small parts can be swallowed by children.
Children can be injured by improper use of tools.
Children can cause damage through improper use of tools.


Select the screwdriver that matches the screw head profile. This prevents injuries if the blade slips. Ensure that the component to be screwed is held securely, in order to avoid injuries caused by the blade slipping off during screwdriving. Avoid stab wounds by directing the pressure onto the screw head, which is necessary to lighten or loosen the tool, away from the body. Wear protective gloves when working with screwdrivers. If the screwdriver is too long, never shorten the blade or handle - choose a shorter screwdriver. Do not use the screwdriver as a mortising or prying tool. Only a suitable screwdriver with an impact cap and/or a pound-thru blade may be used to aid in loosening the screw with light hammer blows.


The chisel driver

The chiseldriver is intended for screwdriving, chiseling, mortising and loosening stuck screws. Not all chiseldrivers have an integrated impact cap. To chisel, use only the sizes which have an impact cap. Never regrind or rework the blade/cutting edge of the chisel driver in any other way.

VDE tools

Work may only be carried out on live electrical installations if it is not possible to switch off the voltage. Appropriate personal protective equipment (PPE) must be worn in these circumstances. Working on live electrical installations may only be carried out by personnel specially trained for this purpose.
The regulations of relevant trade associations and energy supply companies must be observed.
Never use hand tools as accessories for power tools.
Use only insulated tools and tools with suitable IEC/VDE and GS symbols for work on live electrical installations.
When using VDE-insulated tools, never exceed the specified maximum voltages.
Do not expose the tools to extreme conditions, such as extreme heat or cold, that could alter the material properties or the suitability of the tools.
Never change (shorten) the existing insulation of the tool.

ESD tools

ESD tools conduct electricity and must not be used for working with live voltages. They have a special yellow marking.
No electrical voltage sources may be touched.

Voltage tester:


Hold the screwdriver blade to the conductor, and at the same time touch the end of the handle with your finger. Pay attention to grounding. When live voltages are present, the glow lamp built into the handle lights up. The voltage tester must be checked for proper functioning shortly before use. The voltage tester must not be used when exposed to moisture, e.g. dew or rain. In situations where the voltage tester is damp, it must not be used. Voltage testers may only be used for voltage testing,  not for working on live electrical installations, nor on other installations.

Joker wrench


Use only suitable wrench sizes for the specific size of the screw or nut head. This applies in particular to connections with high torque. Never lengthen the lever arm of the tool. Never hit a wrench with a hammer. Always place the wrench at right angle to the screw axis. Always pull the wrench towards you if possible. If, for situational reasons, you can only push the wrench, push it with the open palm of the hand to avoid injuries. Ring spanners transmit the forces more evenly and are therefore better suited for high torques.

Zyklop ratchets


Use only suitable wrench sizes with suitable accessories (e.g. sockets, bit sockets) for the specific size of screw or nut head.
Always use the correct ratchet in relation to the expected tightening or loosening torque requirements. Long levers, especially auxiliary levers, can cause slipping and injuries.


KOLOSS ratchet

Never strike another hammer with a Koloss ratchet or the other way round.
Avoid edge impacts and impacts on hardened parts.
Never strike with the Koloss ratchet when bits or other tools are attached to the square drive.
Never strike with a Koloss when the handle extension or the expanding mandrel is deployed.
Always ascertain that the safety pin is in place on the tip.
Only strike with the Koloss in the defined impact areas.
Under no circumstances may the torque load exceed 600Nm (440 ft.lbs.).
Stop the torque load when the Koloss ratchet starts to bend and/or deform.
Always ensure that the tool connections are duly locked when using the extension mandrel or the expanding mandrel.
Never regrind or rework the tip of the Koloss ratchet in any other way.
Always make sure that the handle is firmly affixed to the shaft. When the "Stop" warning line becomes visible on the shaft, stop working with the Koloss ratchet and immediately send the ratchet back to Wera for inspection/repair.

Zyklop Hybrid ratchet

Use only suitable wrench sizes with suitable accessories (e.g. sockets, bit sockets) for the specific screw or nut head size.
Always ensure that the tool connections are duly locked when using the extension pin or the centering pin.
Under no circumstances may the torque load exceed 600Nm (440 ft.lbs.).
Stop the torque load when the Zyklop Hybrid ratchet starts to bend or to deform.

Soft-faced hammer


Before starting work, make sure that the hammer head is firmly connected to the hammer handle. Select the type and size of hammer according to the work to be carried out. Avoid rebound impact.
Only strike on the striking surface (face) of the hammer.
Wood is a natural product. Too high humidity causes swelling of the handle (damage to the wood fibers), too low humidity leads to shrinking of the handle (in this case the head will lose its secure connection to the handle).

Workshop trolley


To avoid the trolley tilting-over, only open one drawer at a time and store the heaviest contents in the lower drawers. Note the permissible load capacity of the individual drawers and the total load capacity of the tool trolley. Only move the tool trolley with the drawers closed and locked. Pay attention to unsecured objects lying loosely on the shelf or work surface. Always use the locking mechanism when “parking” the tool trolley. This is the only way to secure the tool trolley from unintentional movements. On inclines, always drive the tool trolley "uphill". Do not use the tool trolley as a substitute for a ladder. Never store pointed or sharp objects unsecured in the tool trolley.


L-keys are suitable for manual use.
Due to the risk of injury resulting from possible overload breakage, this tool should only be used with safety gloves.
If visible or noticeable deformation occurs during use, the screwdriving process must be stopped immediately. For loosening such tight screw connections, integrity of the tool must be ensured, to avoid a possible breakage which could result in the risk of injury to the user.
L-keys which show permanent deformation (distorted arm) after overstressing may have invisible micro-cracks. With continued use, these can lead to sudden breakage of the tool at any time. For this reason, tools with permanent deformation must be replaced immediately.


Torque tools

Use only properly calibrated torque wrenches. Treat torque wrenches like measuring devices. Store the torque wrench carefully. Use torque wrenches only within the permissible torque range. Stop tightening the screw immediately after the tactile and audible “click” signal. Place the wrench on the fasteners to be tightened, only at right angles. Use only original modular tools or accessories suitable for the torque wrench. Return the torque wrench to the minimum torque value after finished work. Never use defective or worn accessories.
In the sense of the normative recommendations and particularly in your own interest, a torque tool should be checked, calibrated and, if necessary, adjusted and/or repaired after no more than 5.000 loads or, if the number of load cycles cannot be traced, every 12 months at the latest.

Welding adapter

Welding should ideally be carried out by a specialist welding company.
Strictly ensure good weldability of the part to be welded (e.g. material data sheet).
The WERA welding adapter is made of a material similar to 46Cr2.
Welding surfaces should be free of contamination (ideally prepared down to bare metal).
Use the maximum possible welding surface of the adapter.
Cool the material down after welding as slowly as possible (avoids stress cracks).
If possible, apply stress relief annealing after welding.
Generally suitable for all possible common welding processes: GTAW (gas tungsten arc welding) is preferred.
The welding and subsequent use of the welded part is at the customer's own risk.

Important information regarding change of length & drawing (Fig. 1)

If the depth gauge of the shell tool you are using deviates from the length “Sk”, the actual release torque changes according to the formula shown (Fig.1).