General description Length of 100 mm, this set of 11 long magnetic bits is designed for screwdrivers and electric screwdrivers. The bits are made from S2 alloy steel and feature a 1/4" hexagonal shank, making them versatile for various applications. Technical specifications Length: 100 mm Material: S2 alloy steel Shank type: 6.35 mm / 1/4" hexagonal Available sizes: T6, T7, T8, T9, T10, T15, T20, T25, T27, T30, T40 Usage Compatible with manual screwdrivers, electric screwdrivers, and electric drills. The magnetic feature allows screws to stick to the bits, facilitating easy removal from deep holes without the need to turn or shake the object.