Buying Guides - Electric screwdrivers

Shape

The simplest electric screwdrivers mimic a traditional screwdriver shape and are great for occasional use and driving screws in confined spaces. However, they only provide either 2.4 or 3.6 volts of power and so may struggle with tougher jobs.

The more sophisticated models are multi-positional and convert from straight to pistol shape by means of a swivel centre joint enabling you to work in hard to reach places.

The power for these units is provided by either a 2.4, 3.6 or 4.8 volt battery.


Power

Electric screwdrivers are usually cordless - they are powered by a rechargeable battery and come with a separate charger unit. Motor power is measured in volts (for example, 2.4v, 3.6v). The higher the voltage the more powerful the screwdriver. A higher voltage means you'll finish the job faster before you need to recharge and as a general rule, the higher the voltage the heavier the battery. Look for the RPM (revolutions per minute) speed for a guide to the motor speed of the screwdriver. The higher the RPM number, the faster your screwdriver will turn.


Variable speed and reverse action

The facility to vary screwdriving speed offers you greater control, since you can adjust the speed to suit the type of screw you are using and the material you are working with. See also Torque control (above). All electric screwdrivers come with reverse action, which means that as well as inserting screws, you can also remove them quickly and easily.


Torque control

Adjustable torque (rotating force or turning power) is a useful feature allowing you to control the final twisting force to match different screw sizes. Some screws will require more effort to turn through materials than others, which is useful if you need more power on chunky screws, and minimal power on delicate ones. Variable torque control will also help to ensure that the screw head ends up flush with the surface. However, the actual range of torque you'll need is dependent upon the type of project you are undertaking - a screwdriver with lower levels of torque will be fine for light, infrequent work, whereas a higher torque range is better suited to bigger DIY jobs with lots of screw-type changes.


Before you buy

Is the handle comfortable? If you are left-handed check the screwdriver is comfortable to use. Look for a rubberized or 'soft-grip' anti-slip handle to allow you to maintain a better hold. How long is the life of the battery? - how long does it take to recharge and does it feature a fast charge facility? Does the model you are looking at incorporate a light? Useful when working in poor lighting conditions. Does the screwdriver come with any useful extras such as a carry case or a selection of screw or drill bits? How long is the guarantee?
Buyer's tip

If you are likely to want to do more than just very light drilling, you may want to consider buying a drill driver instead of a separate drill and electric screwdriver. A drill driver allows you to drill and drive screws and is likely to prove more cost effective than buying the two items separately.