This Right Angle Phillips Head and Flat Head Screwdriver Kit provides an ideal solution for accessing hard-to-reach boxes or enclosures. The right angle design of the screwdrivers make them ideal for getting into tight areas or corners, while the allen wrench aid in restricted spaces.
Each one can get into a spot with as little as 15mm / 0.6" of clearance. Note that, in particular, Phillips isn't designed for side torque so this is not for stuck bolts.
You get two 'wrenches' - each one with two heads on each end. Altogether you get a PH1, PH2, PH3 and a 1x6mm Flathead. The tips are magnetized so you won't have the unenvious experience of unscrewing a piece that then falls immediately onto the carpet.