Shelf Pin Drilling Jig for Aligning Shelf Pin Holes Kit Includes; 19" Jig and 1/4" self-centering brad point bit. Jig is set-up for pin spacing of 1-1/4" on center. Can be adjusted for drilling at either 2-1/2" or 1-15/32" from the case edge. Indexing holes keep alignment accurate as you drill along any length board. 5mm holes are possible by changing bit with 5mm self centering bit. SOLD SEPARATELY