RGuimont sent us a link to these diamond-tipped screwdriver bits. The diamond coating “roughs up” the surface of the bit helping it to hold tightly to the fastener — and helping you avoid slipping off the fastener and tearing up a prepared surface beneath.
According to Lee Valley, “the tips have a coating of fine diamond grit that increases friction between the driver and screw head to significantly reduce cam-out. Each bit is milled from chrome molybdenum vanadium tool steel, hardened to Rc57-59, and nickel-plated to resist corrosion.”
We’ve never used any of these, but considering that they start at around $3.20 each, we may have to give ’em a go. They’re available in multiple sizes of slotted, Phillips, and POZIDRIV, and there’s a screw holder/driver available as well.
Diamond-Tipped Screwdriver Bits [Lee Valley]