Silverline Quick-flip Driver Set Large 11pce 11pce Quick-flip driver set for drilling pilot, clearance and countersink in one operation Drill flips over for screwdriver function Hex key built into shank of quick-flip body Set includes quick-flip body, quick change collet, 4 x drivers, 6, 8, 10 & 12 gauge inserts, 2 x Pozidriv screwdriver bits (PZ1 & PZ2), and 3 x slotted screwdriver bits (SL4, SL5 & SL6).