How to choose an impact wrench or impact driver — 2026–2027
Impact tools turn with short, strong blows, so they free seized fasteners easily and do not twist your wrist. It is important to tell an impact wrench from an impact driver.
Impact wrench or impact driver
An impact driver has a 1/4" hex chuck for bits: it drives long screws into wood and metal fast. An impact wrench has a square drive (usually 1/2") for sockets: it tightens and loosens nuts on wheels, structures and machinery.
How much torque you need
150–200 Nm is enough for an impact driver. For car wheels a 300–400 Nm impact wrench is enough; for trucks and rusted bolts you need 1000 Nm and up (3/4" or 1"). Several speed and power modes help you avoid overtightening small fasteners.
Cordless or air
A cordless impact wrench needs no compressor and is handy on the road and on site. An air impact wrench is light, cheap and durable but needs a strong enough compressor; check the air consumption (l/min). Garages often use both.
Impact sockets only
Use only impact sockets (black, Cr-Mo) with an impact wrench; ordinary chrome sockets can crack. Finish wheel nuts with a torque wrench at the torque the car maker specifies.
Where to buy in Yerevan
Two Areg Tools shops, 28 Vardanants St and 1 Tigran Mets Ave, and our own service centre at 32 Vardanants St. Delivery in Yerevan in 1–2 working days. Price on request: +374 93 238766.
Frequently asked questions
Which impact wrench do I need for changing wheels?
A 1/2" model with 300–400 Nm; do the final tightening with a torque wrench.
Can I drive screws with an impact wrench?
An impact driver with a 1/4" hex chuck is better for that.
Why do I need special sockets?
Impact sockets are made of tougher steel and do not crack under the blows.
Where can I find impact sockets?
In the Impact sockets & adapters section of the website and in the Areg Tools shops in Yerevan.
