Screwdriver Bits Set Strong Batch Head High Hardness 25/50/65/70/90/150mm Non-slip Screwdrivers

Features: heat treated, durability, has high hardness, not easy to wear.
Professional hex- bit set steel, very well made and tough- as nails
Hardness can reach HRC62 degree. Hex-key set 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 of the drill bit is reached due to its construction and superior technology
tips- and nickel plating surface-treatment, super anti-rust,long lasting and easy to use

Specifications: Main Product: Screwdriver Bits Set
Steel
Color: Black
Size:1/4 Inch Hex-(6.35mm)
Quantity：6PCS （25mm 50mm 65mm 70mm 90mm 150mm）

Package Includes: 6pcs x Screwdriver Bits

note: Please allow 0-1cm error due to manual measurement. please make sure you do not mind before you bid.
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!