The BERNINA Threading Wire for L850 and L860 Machines is a handy tool designed to keep your sewing projects on track. If the air threader is not functioning or a looper pipe is blocked, this threading wire can be used as a temporary solution to thread your machine and allow you to complete your ongoing sewing project. It's particularly useful for manual threading of textured thread. This threading wire is compatible with the L 8 Series, making it a valuable addition to your sewing toolkit, ensuring that you're prepared for any threading challenges that may arise.