C.S.Osborne & Co. No. 417-L 18" Extra Long Tufting Needle, great for matresses (MPN# 64388) 18 inch Long, With instructions./ Osborne No. 417-L / MPN - 64386 Working Process: At the start, assemble on the thread the corresponding quantity of clasps for the required number of stitches. clasp with thread in the hollow of the needle. Push needle (with ed clasps and thread) through upholstery fabric, press head of needle. Clasp with thread will be ejected. Pull the needle out and tighten the thread, clasp will be anchored inside.