Review on ARES 70013 - 8-Piece S2 Steel Impact Driver Bit Set: Phillips 1-4 & Slotted 1/4-1/2 Inch - Premium S2 Steel Construction by Eloy Boelkens

I only needed the largest flat bits but they worked well. The lower block transmission oil screw was stuck and using the largest flat tool in this set I unscrewed the large head of this screw completely. I also heated the PB Blaster penetrant and applied it heavily, but the bolt literally melted into the hole. The bits on this tool (the largest 2) didn't deform at all during the use of my handshake with a 24 oz ball head hammer. After the broken screw head was gone, I was able to easily drill out and remove the remaining stuck thread. Highly recommend using these bits for stuck screws!