Singer 12ct Class 66 Metal Bobbins Sewing Notion (Set of 12)

This set of 12 class 66 metal bobbins serve as replacements for the top drop-in bobbin sewing machines. Consult your machine’s manual to ensure the correct bobbin size. Use the bobbins beneath the needle plate in automatic sewing machines to wind the thread for your embroidery projects. Never add a thread to a partially wound bobbin, as it may be uneven and cause the thread to tangle or break.