STRONG HARDNESS: Made of steel material, possess strong hardness, can reduce wear and ensure service life
SANDBLASTED TO PREVENT CORROSION: The of each drill bit is sandblasted to prevent corrosion and be more durable
A VARIETY OF SPECIFICATIONS: Contains a variety of specifications, easy for you to use, can meet your different needs
ENOUGH TO REPLACE: A total of 100pcs of tools, which is enough to replace. Easy to install and disassemble, you can operate by yourself
LONG SERVICE LIFE: Security bit set come with stable structure, excellent performance and long service life