Posted 8/12/2017 16:53 (#6182762 - in reply to #6182751) Subject: RE: screw gun
There are several variations. Some with adjustable slip clutches, some with instant clutches that disconnect the drive when you pull back on the driver, some with impact drives so a little driver will drive bigger screws. The instant clutch types are preferred for dry wall because its easy to pull a screw head through dry wall. There are attachments for those to automatically pull back when the screw head gets flush with the dry wall. I don't do dry wall and I like the little impact battery driver. With it the torque depends on the position of the trigger.