Replacement accessories are compatible with the soldering iron on the Tenma #72-6345 Rework Station, as well as older Model #21-147 and #21-1590 soldering stations. #21-151 Grounded Replacement Iron utilizes a fivepin DIN plug and is compatible with Tenma #21-147 and #21-1590 stations. The #72-6345 Replacement Iron utilizes a 4 pin screwon connector and is compatible with the #72-6345 rework station. All other accessories are interchangeable.