General description The 11-Piece Long Screwdriver Bit Set features magnetic bits designed for efficiency and convenience. With a length of 100mm, these bits are suitable for various applications, allowing you to use them anytime and anywhere. Technical specifications Material: S2 Alloy Steel Head Type: Torx Shank Type: 6.35 mm (1/4 in) Hex Length: 100mm Available sizes: T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, T40 Usage Compatible with manual screwdrivers, electric screwdrivers, and electric drills. Magnetic bits hold screws in place, making it easier to attach and remove screws, even in deep holes.