Features : 

*Heat treated, durability, has high hardness, not easy to wear.

*Professional Bit Set Are Made of S 2 Alloy Steel, Very Well Made And Tough As Nails。Hardness can reach HRC60 degree. 

*Fit for electric drills with speed regulating device, electric screwdrivers, hand screwdrivers.

*Please do not use drill bits on pneumatic tools, air dills, and the electric drill without speed regulation. 

*A long lifetime of the drill bit is reached due to its construction and superior technology.

*Nickel Plating for Treatment, Super Anti-Rust 。High quality, long lasting and . 

*The drill bit set is clearly marked that you can find what size you need quickly.Easy to take and use.

*The screwdriver set is a little bit magnetic, which helps to keep nuts and bolts stuck to them. 

Specifications:

Batch head diameter: 5.5mm

Shank diameter: 6.35mm

Length: 65mm, 110mm, 150mm 

Colour: black, yellow

Main Product: Cross Screwdriver Bits Set

Material: S 2 Alloy Steel

Size:6.35mm

Special:Anti-slip

Suitable for:manual and electric driver

Package Included: 

Package 1: 1pc Screwdriver Bit

Package 2: 2pcs Screwdriver Bits

Package 3: 3pcs Screwdriver Bits

Package 4: 6pcs Screwdriver Bits

Package 5: 9pcs Screwdriver Bits