Once again i improre you all to join the 12v driver master race. I can't understand people fucking around with ratchet drivers for PC building purposes. they're total crap since the tension required to activate ratcheting is the same required to fasten the screw and the pitch is so fine and short that the ratcheting will never be used.
Ratcheting screwdrivers are a low iq purchase for PC work.
Bosch PS21 - $, brushed, basic and reliable, cheap to buy in a nice kit with 2 batteries and an impact on sale several times a year
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Bosch PS22 - $$, brushless, soft-start, lower power, shorter than ps21, discontinued, but the best one for electronics/computers since it's very gentle, if you can find it
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Bosch GSR12v-300hxn - $$, brushless, way more powerful, 1/2 inch shorter so you can actuate the chuck with pinky, needs trigger discipline, loud, but much more useful around the house thanks to extra power
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I suppose Milwaukee fuel m12 and 12v Dewalt Atomic are also good but Bosch has the best combo of size, ergos and price.