Korect-A-Bore along with your mandrill is just what
the doctor ordered when you want to change the backset on a cross bore hole from
2 3/8" to 2 3/4" and vice versa. Korect-A-Bore also provides an easy
method for enlarging a cross bore hold when you're replacing a particular manufacturer's
lock with another manufacturer's where a different size cross bore hole diameter
is required. And that's not all! Korect-A-Bore assures of "truing" a
hole properly so that the replacement lock you install will fit perfectly.
