Group of extended bits: magnetic extension for accommodating various bits. Easily handle various screws in daily life with more options available. Compatible with ROXON KS2, H1, S802S, M2, M3. Includes 9 different sizes of screwdrivers: T8, T6, T10, PH0, PH2, PH000, PH0, H4.0, H3.0, 2.0.