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This is designed to help make sure any holes drilled in your vintage or replica Graflex are in the right spots. It's recommended that you use a marker to mark on your pommel where the holes are. Some masking tape or painters tape can be used to keep the guide in place while you do this. On the bottom are guides to line up your d-ring along the correct axis. Once the marks are in place remove the guide and use a drill to make your holes.
Please note: This is designed for installing grips for The Force Awakens-Rey style modifications. As such it has 6 holes placed 16.7mm from the bottom.