Features:
Made of high quality S2 steel material which is durable and tough, a commonly used material in hardware.
This set includes 2 types screwdriver bits (PH1 and PH2) in different sizes which will meet you basic need.
With 1/4inch hex shank, they are widely used on electric screwdrivers, hand screwdrivers, electric drills, etc.
They are great bits for you to have in your tool box and will not worry about not having the proper screwdriver any more.
Widely used for professional maintenance personnel, computer maintenance, camera maintenance, eyeglasses maintenance, instrument maintenance.

Specification:
Materials: S2 steel
Hex Shank: 1/4in Length*Diameter*Type:
100mm*3.0mm*PH1
100mm*4.0mm*PH1
100mm*4.0mm*PH2
100mm*4.5mm*PH1
100mm*4.5mm*PH2
100mm*5.0mm*PH1
100mm*5.0mm*PH2
100mm*6.0mm*PH1
100mm*6.0mm*PH2
Weight: 150g(approx.)

Package Includes:
9 x Screwdriver Bits

Note: Please allow small size error due to manual measurement. Thanks for your understanding.