NOS Vintage Yale & Towne No. 91  Door Lock Installation Boring Jig Series 5200

The doorknob hole on both sides is 2" 

Offset on Bracket edge of door to center of hole is 2-3/8"

First photo shows sealed box from long time storage (box is brittle and may be coming apart)

Buyer will receive a opened box due to inspection

Made in U.S.A.