This is a Phillips #1 #2 #3 Impact Tough Screwdriver Power Bit set that includes Insert bit set for PH1, PH2, and PH3.
Biindividuals last up to 30X longer than standard impact biindividualsBiindividuals feature precision machined tips, pulse torsion rings, an optimized torsion zone, and unique steel, combine to Gourmet Shopver improved overall performance and bit lifePrecision machined tips provide a superior full contact fit for improved holding power and longer life