This is the beginning of a bump key. If you only want 1 key - I would start with the SC-1. To make this key, you have to cut the key down to all nines. (Your locksmith will know what this means).
How to Bump a Lock with a Bump Key: Simple Tips & Tricks
Product Type: BUMP KeyKeyway: SC1Manufacturer: JMAWhat Are Bump Keys?Bump keys are specially cut keys that can bypass the security mechanisms built
BUMP Key For Schlage - SC1 ( JMA-BUMP-SC1)
Stye (Hordeolum): Symptoms, Causes, Treatment
First attempt at a bump key. Not working. Help? : r/lockpicking
What the Shape of Your Bump Really Means
Bump Key: Yale Super Bump Universal Key
Bump Key, This is the beginning of a bump key. If you only …
What is a 'key bump'? Merriam-Webster explains after Cawthorn interview. - The Washington Post
Bumping a Lock with a Bump Key
Tactikey KW1, Sharpened Key