Screwdrivers are indispensable for home improvements and skilled crafts. They are one of the basic items in every toolbox – whether for professional or home use. When fitted with ergonomic handles, they can help avoid tensions and pain at work.
Screwdrivers are one of the most used of all tools. No matter whether they are used regularly or just now and then, if they don't lie in the hand properly with optimum force transmission, the user will quickly feel tension and pain. This can even become an occupational illness if the shoulders and back can't take the strain any more.
The handle of a screwdriver should therefore be designed to permit effective, ergonomic use.
When looking for the right tool today, there's a huge range available, particularly when it comes to screwdrivers. A closer look at the screwdrivers will reveal to even the unpractised eye that the handle lengths of most makes are adapted to the screw sizes. The smaller the screws, the shorter the handles. Actually, this is rather strange as it does not make any ergonomic sense. The screwdrivers are then much too small for most hands. This means they do not lie well in the hand, and the force transmission also leaves a lot to be desired. The result is incorrect posture and tense, aching hands.
Screwdrivers whose different handles are adjusted to the anatomic requirements of the hand are far more suitable. Narrower handles for example are ideal for precise working. In this case, the handle must be long enough to ensure that the tool is held securely. Wider or thicker handles are ideal when greater force is required. As far as possible, the actual handles should be made of top quality material that can be recycled and also available with different surfaces in accordance with the specific purpose. Priority should also be given to an ergonomically shaped handle. This lies well and securely in the hand and permits controlled work without any slipping. As a result, less strain is placed on the whole locomotor system involved in using a screwdriver, without the need for any additional effort. Ergonomic handle concepts therefore reduce strains on the hands, arms, shoulder girdle and the spinal column.
Different dimensions and profiles in the screw-driving zones are beneficial. As a basic rule, a fast screw-driving zone – at the start of the handle with a circular cross-section – is ideal for fast, dexterous screw-driving. The tool is guided by the palm of the hand. The fingers drive the screws. A force screw-driving zone – starting in about the middle and extending to the end with an extra large cross-section – is ideal for comfortable maximum force transmission. Harder materials are used for the fast screw-driving zone and softer ones for the force screw-driving zone. Ergonomic handles permit optimum force transmission with more comfortable, longer and above all, pain-free working.
The blades or metal parts of the screwdriver should naturally be made of top quality tool steel. They should be available for the full range of possible screw-driving tasks and with different blade tips (drive output). Visual identification aids help with allocation of the drive output so that the handle already shows whether this is a slotted or Phillips screwdriver. Round handles should have a roll-off protection feature so that the screwdriver cannot roll away.
Wiha Werkzeuge GmbH
Phone +49 7722/959 0
Fax +49 7722/959 160