For picture hanging flush to the wall.
Plunge cutter & move forward then retract out from entry hole.
A template is recommended.
For No8 & No10 screw heads.
Not suitable for grooving applications.

Specification:
D=9.5 mm
D2=4.5 mm
C=4.5 mm
Shank Diameter=1/4 inch
S=5.5 mm
OL=53 mm