Drum Locking Ring

https://www.drumclosure.com/products/drum-lock-ring/

Steel drum locking ring is a reliable sealing component for open head steel drum, open head plastic drum and fibre drum. It seals the drum lid and drum body by hooping them together. Drum locking rings usually vary in diameter, thickness, cross section design and closing components (drum clamp or drum bolt). Surface of the drum lock ring is galvanized, and it is able to protect contents in drum even under strict storage condtion.