A 13mm lashing chain tensioner, also known as a chain tensioner or chain binder, is a device used to tighten and secure cargo lashing chains, ensuring a secure hold during transportation. These tensioners are used in conjunction with cargo lashing chains to secure heavy loads, especially in RoRo (Roll-on/Roll-off) shipping and maritime transport. 
Key Features and Functionality:
Purpose:To apply tension to the chain, preventing cargo from shifting or sliding during transit. 
Mechanism:Typically involves a ratcheting mechanism that allows the user to pull the chain through the tensioner and apply tension using a lever. 
Common Use:Securely holds heavy loads on ships, trucks, trailers, flatbeds, and other cargo-carrying vehicles. 
Materials:Made from strong materials like carbon steel, alloy steel, or stainless steel. 
Benefits:Ensures cargo remains stable, reduces the risk of accidents, damage, or loss of cargo. 
Compatibility:Designed for use with 13mm lashing chains, which have a total length of 6 meters and a Working Load Limit (W.L.L.) of 20 Tons. 
RoRo Transport:Frequently used in RoRo transport for securing vehicles, trucks, and industrial machinery on board. 
Drawing of Lashing Chain Tensioner 13MM:

Specification of G80 Lashing Chain Tensioners:
| Dimensions | 13MM | 11MM | 9MM | 
| Material | Forge steel | Forge steel | Forge steel | 
| Breaking load tension | 20Tons | 15Tons | 10Tons | 
| Working load tension | 5Tons | 3.75Tons | 2.5Tons | 
| Finish | Painted | Painted | Painted | 
| Loose fixed | Loose container lashing material | Loose container lashing material | Loose container lashing material | 
| Remarks | Customized colours | Customized colours | Customized colours | 
| Weight | 5.7kg | 4.8kg | 3.8kg | 
| Category | Lashing chain tensioner, and tension levers | Lashing chain tensioner, and tension levers | Lashing chain tensioner, and tension levers |