Those Square Head Screwdriver Bits are made of S2 alloy steel which is a commonly used material in hardware
Magnetic bits are firmly fixed on screwdrivers
3 sizes a set at an affordable price can meet your requirements
Brand: JAPAN SEALS
Materials: S2 alloy steel
Type of shank: 6.35mm / 0.25 inch hex
Net weight: (approx.) 35g
No. Size of head (mm) Lgth.(mm)
S1 2.4*2.4 50 / 2 in.
S2 3.0*3.0 50 / 2 in.
S3 3.4*3.4 50 / 2 in.
3 X Square Head Screwdriver Bits