A: Hi Rick- the bit cannot be replaced.
A: Hi BobL - this arbor is designed for all drill chucks 1/4 in. and larger.
A: Thank you for your recent inquiry about the 1/4 in. Small Hole Saw Arbor W/ Pilot Drill Bit. The minimum chuck size required for the Door Lock Installation Bi-Metal Hole Saw Set, Model #49-22-4073, is 3/8 in. Thank you for shopping Home Depot.
A: You don’t need Amit. Just thread the hole saw blade onto the arbor hand tight and use.