Drill Bit extension for Baum & Nygren Dahly Drill Heads.

Compatible with 5/32", 3/16" and 7/32" diameter drill bits

1.43" Height x 0.443" OD x 0.306" thread width

Equivalent to mfg. # N-37
See E-1 for 1/8" diameter bits or E-3 for 1/4" to 5/16" diameter bits.