This type of chain stopper is designed to hold the anchor chain firmly and prevent it from moving when the vessel is anchored. 

Key Features:

• Material: Usually made from high-strength steel to withstand heavy loads and harsh marine environments.

• Construction: Robust design with a bar mechanism that can lock and hold the anchor chain securely.

• Operation: Manual or automatic operation depending on the specific model and requirements.

• Compatibility: Designed to be compatible with various sizes of anchor chains as per JIS (Japanese Industrial Standards) specifications.

• Durability: Corrosion-resistant finish to enhance longevity in seawater conditions.

Applications:

• Used on ships and offshore platforms to secure anchor chains.

• Prevents the anchor chain from slipping when the vessel is anchored, providing safety and stability.

Maintenance:

• Regular inspection for wear and tear.

• Lubrication of moving parts to ensure smooth operation.

• Periodic testing to ensure the stopper can handle the specified loads.

• This type of chain stopper is critical for safe anchoring operations, providing a reliable means to secure the anchor chain and maintain the vessel's position.