Speaking of torque, this screwdriver is it! Never seen any mention of it here but it is the way go.

http://www.kctoolco.com/wiha-adjustable-torquevario-10-50-in-lbs-p/28506.htm

You will need this quarter inch adapter.

http://www.kctoolco.com/wiha-bit-holder-adaptor-blade-for-1-4-bits-p/28581.htm