1. Transmission Chains
Power tranny chains are transmission chain categorized into six major groupings.
1.1 Standard Roller Chains. These chains are designed for general usage.
1.2 High Performance Chains. These chains have higher tensile strength and greater fatigue strength.
1.3 Lube-Totally free Chains. These chains have longer 
put on life than regular chains without lubrication.
1.4 Environmentally Resistant Chains. Chains with unique corrosion resistance.
1.5 Specialized Chains, Type 1. For specific applications.
1.6 Specialty Chains, Type 2. For general designs.
Within these six groups, there are plenty of types of chains available