What are the white/black/red bushings for the drill bit used for?
The Perfect-O allows you to use most drill bits for tapping with bushings that fit onto the bit.
Bushings help stabilize the bit inside the Perfect-O.
These bushings come in different colors depending on the size of the bit. Here they are:
- 15/64: black
- 1/4: white
- 17/64: red
- 19/64: no bushing needed
- 5/16: no bushing needed
Due to the rare use of 17/64 bits, red bushings are only supplied with these bits.
New 15/64 and 1/4 bushings are included with each Perfect-O.
And each pack of 5 bits (15/64, 1/4, or 17/64) includes 5 bushings.