This component is the knife-press assembly for the cutterbar of a grain-harvester header. It holds the reciprocating knife section against the stationary ledger plate, maintaining the contact force needed for a clean cut. The press sits on the header frame above the knife drive; its clamping action prevents the knife from lifting during dense crop flow. A worn press allows the knife to lift, leaving uncut stubble and increasing the risk of knife-section breakage. The original geometry matches the header's mounting-hole pattern and spring-load specification, so no shimming or bracket modification is needed during replacement.