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Workhorse Rail's line of AAR approved knuckles are manufactured to standards that exceed AAR requirements. Each knuckle is 100% wet magnetic particle inspected, hardness tested, and fit up and operated prior to shipping to provide the highest quality knuckles to our customers. Workhorse Rail's slack reduced E50BEV design is AAR M-216 approved. Always in stock, Workhorse Rail knuckles are available from our three distribution warehouses or are available for direct ship container to user locations to eliminate inbound freight.