Serger / Overlocker use different needle systems according to the make and model of the sewing machine. Refer to the machine instruction book or the list here belw to select the correct needle.
Klasse - Type E (System HAXISP)
Babylock SL600, SL700, SL800, All BLE series, Janome 100, 200, 300, 400, & 500 series Protage 402 Globe All models Husky SL3000 series, 34D Toyota SL3400, SL3403