Major HIT-21 Instructions page 4

Thread the drill guide
in until it makes
contact with the inside
of the mortise pocket.
Shown at right is a drill
with a 1/4" drill bit. The
center of the HIT-21
has a hardened steel
sleeve.
Drill from the outside
thru the mortise
pocket. Drill slow, you
don't want to blow out
the other side.
The 1/4" diameter hole
is now in the center of
where the cylinder will
be located.
Replace the pilot bit of
your hole saw with the
supplied drill blank.
Drill the cylinder hole.
Use a low RPM and
back the hole saw out
several times when
drilling to remove
chips.
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