00147 Tight Fit® #3-4 Slotted Threaded Shank Screwdriver Bit

The 00147 #3-4 slotted screwdriver bit has 1/4-28 external threads, wrench flats for loosening the bit and is black oxided to prevent corrosion and enhance appearance.  It works with the right angle drill attachment (00400) and the extension set (00120).