Lower Knife , Babylock, Elna, Riccar, Simplicity #60544

Compatible with Babylock Serger Machine Models: BL202,BL300,BL302,BL400,BL430,BL432,BL450, BL450A, BL4350D,BL5030,BL5040& BL5040L. Compatible with Elna Serger Machine Models: T3, T33, T34 & T34D. Compatible with Happylock Serger Machine Models: 1867. Compatible with Riccar Serger Machine Models: 564DE, RL613, RL624, RL634DE, RL634E, RL613E, RL624E & RL724E Compatible with Serge Mate Serger Machine Models: 300, 430, 432, 5030, 5040 & 5040L Compatible with Simplicity Serger Machine Models: SL200, SL350, SL370, SL803, SL804, SL804D, SL843, SL4300, SL4350D, SL4360ED & SW432