Introducing the SIW 6AT-A22 impact wrench


Internationally approved anchor setting using the SIW 6AT-A22 and SI-AT-A22

No matter what material you’re working with, the Adaptive Torque (AT) system can make approved anchor setting quicker and easier – just scan the box and pull the trigger.

Suitable for a broad range of materials

Working with concrete


Working with wood


Working with metal


EASY TO USE, EASY TO ADJUST AND INDUSTRY APPROVED to ETA and ICC-ESR standards for installing Hilti stud anchors

SIW 6AT-A22 impact wrench

SIW 6AT-A22 impact wrench

Combining intelligent electronics, a robust anvil and a sleek nose cone to reach into tight spaces, the SIW 6AT-A22 impact wrench is a small but powerful system for the installation of expansion anchors and metal bolts.


SI-AT-A22 module

A small, very light interface module which slots in between the impact wrench and battery. The interface module crunches live data from the SIW 6AT-A22 to confirm if an anchor has been torqued according to ETA and ICC-ESR approvals.

Documenting work

Documentation for inspection

Full accountability has never been easier. Simply connect the SI-AT-A22 module to a computer using a standard USB cable and the AT Documentation Software then downloads installation data stored by the SI-AT-A22, which can be used to produce an installation report.

Installing anchors

Anchor installation

Using an algorithm developed from over 10,000 tests, you can install Hilti stud anchors according to ETA and ICC-ESR approvals.

Once complete the user receives a visual indication by a green light, a notification on the display and hears an audible confirmation sound.

Installing bolts

Bolting applications

You can use AT-equipped tools for pre-tightening standard bolts (M8-M16 or 3/8"-5/8") to a repeatable pretension level and protect the bolts from being over-torqued.

You can select from 30 pretension settings or scan a Hilti Bolting QR code for quick and easy selection of the right bolt setting.

Retorquing and alignment

Retorquing and alignment

The adaptive torque system is intelligent enough to detect an anchor which has been tightened and then loosened again. This allows you to retighten an anchor ensuring no over-torqueing occurs.

This function is useful for straightening or aligning neighboring fixtures, such as railings and base plates.

Find out how the Adaptive Torque System can work for you

Hilti has saved us so much time.

without these tools we need at least 8 weeks to finish the project

"Hilti has saved us so much time. You can place one anchor after the other, you can work continuously without getting out of breath as it was before. We have been here for 5 weeks but I know for certain that without these tools we needed at least 8 weeks to finish the project. "

See what existing users say


SI-AT-A22 module


Adaptive torque module to equip the SIW 6AT-A22 impact wrench for anchoring and bolting in line with approvals

Adaptive torque documentation software

AT documentation software

Installation report software to import data from the SI-AT-A22 module

SI S 1/2" long impact socket

SI-S 1/2" long

1/2" (inch) long impact socket for tightening bolts and anchors

Helping you with your daily business


Services to keep you performing

Unforeseen or hidden factors like lost or damaged tools and repair costs can lead to serious productivity issues on the jobsite.

Our service offerings help you avoid these additional costs and keep you working.

Dedicated customer service agent just a phone call away


Whatever the job, wherever you are, our teams are always available to help you get the job done

We have dedicated account managers and technical consultants who will meet you directly at the jobsite and offer solutions instantly.

Our customer service agents can provide information, take orders, arrange deliveries and repairs all in just one phone call. And, you have instant access to our products at our many Hilti Stores, where you can try out our tools and inserts and get further advice.