Just thought I'd share my experience with the QUINN
Diamond Tip Screwdrivers, 6 Pc. set. I purchased this a few weeks back on coupon just to try them out and I've been very impressed so far. Multiple times they've exceeded my expectations. The non-slip ends are legit and bite into the screw head very well. Just today I used them while repairing my fridge. I had to remove Phillips screws that were recessed and actually under layer of ice (evaporator had iced up). Not only did it not strip out, but it actually bit and held the screw while I removed it from the recessed area. I hope they make a bigger set of these at some point.