This ToolPRO 31 Piece Flexible Screwdriver kit comes with 20 screwdriver bits and 10 nut driver bits. This tool is very convenient with its versatility and allows for much easier storage than keeping 30 individual tools. The screwdriver's handle is designed with an easy-to-grip rubber and the shaft is flexible to access a larger variety of places. The 20 included screwdriver bit pieces are five slotted (sizes 3-7), five phillips (PH0-PH3), four torx (T10-T25), four hex (H3-H6) and two square (S1, S2). The 10 included nut driver bits range in size from 4-13mm. All 30 bits are housed in a labelled plastic casing that makes storage and proper sizing very easy to manage.