The 19″ jig is set-up for pin spacing of 1-1/4″ on center. The jig can be adjusted for drilling at either 2-1/2″ or 1-15/32″ from case edge. Included is the jig and 1/4″ self centering brad point bit. You can also drill 5mm holes by swapping out the 1/4″ self centering bit with a 5mm self centering bit. 5mm bit SOLD SEPARATELY.