C.S. Osborne No. 523 Stainless Steel Serpentine Needles
C.S. Osborne stainless steel serpentine needles have an S-shaped double curve that lets the needle travel in and out of tight seams, corners, and recessed areas where a straight or single-curve needle won’t fit. Stainless steel resists rust on damp or outdoor work. These No. 523 needles come in 3-1/4", 4", 5-1/2", and 6" lengths. See Curved Round Point Needles for general upholstery seams.