Drill Bit extension for Baum & Nygren Dahly Drill Heads.

Compatible with 1/8" diameter drill bits

1.43" Height x 0.437" OD x 0.30" thread width

Equivalent to mfg. # N-37
See E-2 for 5/32" to 7/32" diameter bits, or E-3 for 1/4" to 5/16" diameter bits.