Wiha special chrome-vanadium-molybdenum tool steel
Through hardened for best wear resistance
Corrosion protective Hard Chrome Finish
Exact Fit Precision Machined Tips 
Precision Handle is made of high Quality cadmium free Plastic
Molded on handle for permanent bond to blade
The Tapered Shape allows rapid rotation 
Handles Proportioned to Blade Size for optimum torque
Precision Turning and Control with the Rotating Cap
 
Sizes:
1.5mm~1/16"
2.0mm~5/64"
2.5mm ~3/32"
3.0mm~1/8"
3.5mm~9/64"
4.0mm~5/32"