The Baby Lock B8200-04B Serger Looper Threading Wire assists in clearing blocked threading tubes or manually thread your looper. It is particularly helpful with specialty threads like wooly nylon. Fits Baby Lock Serger Models: BLE1AT-2 Imagine, BLE1DX-2 Eclipse DX, BLE1SX-2 Eclipse SX, BLE3AT Imagine, BLE3ATW Imagine Wave, BLE3ATW-2 Enlighten, BLE8 Evolve, BLES4 Acclaim