Janome MOD-8933 Serger with Lay-in Threading, 3 and 4 Thread Convertible with Differential Feed Janome MOD-Serger Overlock with 3 and 4 Thread Options Lay-In Threading System with Color-Coded Thread Guides Quick Change Rolled Hem and Adjustable Presser Foot Pressure Differential Feed helps prevents stretching and puckering Easy Accessible Lower Looper with Pretension Setting Slider