electric screwdriver with torque and speed control

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Anyone recommend an electric screwdriver with variable torque limiter and (preferably) some form of speed control. It needs to be the straight handle type, i.e. not a pistol grip only model. Basically it's for screwing and unscrewing 2 - 4mm ish screws in alloy casings and PCB mounts. I've seen one high end DeWalt available and one el-cheapo, but otherwise they seem pretty rare beasts.

Anyone know of anything else out there?

MTIA

[Scabbydug]

Draper do a 3.6V with 12 torque settings.

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In message , Scabbydug writes

Thanks, I'll take a look