Canadian Flexi Drills Bell Hanger (feeler Bits) 1/4" X 24" Long Reach Canadian Flexi Drills Bell hanger bits are double tempered high-carbon steel that has been ground from solid material. Fast cutting and highly accurate, with wire fishing hole in the flute end for when you need it. Drill tip specially hardened for longer bit life. Made in Canada with American steel. The 1/2 models are tapered to 3/8 shaft.