Square Power Bit #2 x 2"
Precision machined tip
Torsion zone absorbs torque peaks increasing bit life
Engineered to significantly exceed ISO standards
Significantly longer life compared to standard bits
I was burning up bits. These were recommended by @toolaholic and totally impressed have gone thru 5 lbs of square 2 screws in pressure treated lumber have only used one bit!
Wxcellent service and product