Anybody know what this little eyelet is for ? I un threaded it

Types of Bolts: Types, Components, and Fastener Terms

Sun Zero Cyrus Thermal 100% Blackout Grommet Curtain Panel - Charcoal

Sun Zero Cyrus Thermal 100% Blackout Grommet Curtain Panel, 40 x 96, Teal

Eyelets: Types, Installation, Applications, and Benefits

FRED (u/MissouriFred) - Reddit

Pretty new to fishing] my reel is pivoting at the top therefore

Types of Bolts: Types, Components, and Fastener Terms

Advice On Knotting Elastic Stretch Magic Thread

Learn to Hand Sew: The Eyelet

How to Thread a Sewing Machine – Love Sew

No Knot Eyelet