... quality control Leather Needle, Sewing Needle, Household Sewing Needle, Sewing Machine Needle, Needle, Knitting Needle, Felting Needle, Stamping Needle, Leather Machine QINPAI ... directly being sold to the costume manufactures, knitting manufactures and shoe-making manufactures. Outstanding quality ... Stamping 4) Wonderful heat treatment 5) Automatic needle selection 6) Strict quality control process7) ...