The Sir Tools' 12-in-1, Fold-Up Mini Pick Set, No. ST 9027 removes powertrain oil seals, o-rings, clips, washers or fuses, and adjusts and retrieves small or delicate parts. The two halves of the tool slide apart, exposing 12 differently configured picks. Each pick is firmly held in place by a spring loaded lock mechanism. With the simple press of a button, the pick folds out and locks into place, ready for use.