Mango TU231 Mini Driver. Key-ring driver set with 4 screwdrivers. This little gem wont just look good on your key chain, but it very useful too. It cleverly contains 4 screwdriver heads – both small and large Phillips and flat screwdrivers. Simply remove the quick release clip and slide a key or coin into the slotted end to add torque so you can undo/do up the toughest of screws. A second double-ended bit is hidden in the shaft. 2.4" x 0.4". Patent pending.