This component is a spring-loaded clamp assembly that secures the knife section of a combine header to the cutterbar. It applies downward pressure to hold the moving knife against the stationary ledger plates, maintaining the cutting gap needed for clean crop separation. A worn or broken clamp allows the knife to lift, leading to ragged stubble and increased draft load on the drive system. The assembly matches the original geometry of the cutterbar mounting holes so the clamping force is distributed evenly across the knife back. When reinstalling, ensure the clamp bolt is torqued to specification and that the knife section is seated flat against the ledger plate before tightening.