6 Xcelite WELLER LM-8 MAGNETIC 1/4" Nut Driver Sheet Metal Chassis Screw Starter
Xcelite still includes one in many of their tool kits. You get a box of 6 Xcelite-Weller L8-m, 1/4" nut drivers. These have the magnetic insert about 1/8" in. So are NOT hollow shaft. This is the only size I have for sale.