This Roebuck  20 piece  tool  kit  is  very  usefull in servising  B&O  I have  used one for a long  time  
The screwdriver has a rotating head to enable simple and precise control of the blade. Supplied in a robust, plastic storage case.
Contains:
Slotted: 2, 2.5, 3, 4mm
Phillips: No. 00, No. 0
Pozi: PZ 00, PZ 0
Hex: 1.5, 2, 2.5mm
Hex ballpoint: 1.5, 2, 2.5mm
Torx: T6, T7, T8, T9, T10