Fine mechanics bit set with handle and extension for all jobs where screwdriving is required the extension can stay in the handle and the bits are held tight by a tension spring this will enable you to work easily and quickly handle length 11 cm extension 115 cm you will receive one of each slotted head 10 15 20 25 30 35 40 philips ph000 00 0 1 internal hexagonal 07 09 13 15 20 25 30 40 internal wedged t4 t5 t6 t7 t8 t9