HARDNESS MATERIAL: The torx bit set 1/4 drive is made of premium S2 steel, which has high hardness, durability, and ensures stability after long-term use. SIZE INFORMATION: The length of the security torx set is 100mm, enable it sufficient for more projects. There are T10, T15, T20, T25, T27, T30, T40 specifications to choose from. STRONG MAGNETIC: Each star screwdriver drill bits sets has a magnetic top and end, with precise contours that can easily hold screws and improve work efficiency. EASY TO USE: The magnetic design of torx screwdriver sets allows for easy suction and removal of screws, which can used in electric screwdriver and the handle can also help to turn the screw manually. WIDE APPLICATION: The long torx security screwdriver bits can be easily inserted into any 1/4” hex shank drill, hand tool, impact driver etc., Weight: 0.330693393 pounds, Manufacturer: Eteamcan