These machine bits are typically used by kitchen furniture manufacturers for recessing circular hinges. This type with scribers is used on veneered and wood finishes.
Use with pillar drills only.

Dimensions:
D=15 mm
OL=60 mm
Shank Diameter=1/4 inch


Shank Diameter: 1/4

Grade: TCT

Diameter Metric: 15

Overall Length Metric: 60