The present invention, in particular embodiments, provides methods, apparatuses and systems directed to providing a mechanism by which clients can transparently access remote file server appliances. The end effector assembly includes first and second jaw members disposed in opposed relation relative to one another. A guide roller 32 is rolled while the guide roller is engaged with the first groove 52, and a flange 17 is inclined by a conical surface of a tapered roller 38 of a hemming roller 30 that moves in an interlocking manner with the guide roller 32.