| 2'' | BTC-200KC | Bauer type Coupling 2" serrate shank |
| 3'' | BTC-300KC | Bauer type Coupling 3" serrate shank |
| 3-1/2'' | BTC-350KC | Bauer type Coupling 3-1/2" serrate shank |
| 4'' | BTC-400KC | Bauer type Coupling 4" serrate shank |
| 6'' | BTC-600KC | Bauer type Coupling 6" serrate shank |
| 8'' | BTC-800KC | Bauer type Coupling 8" serrate shank |
