Designed for sewing machine repairs, craft projects and home work. Very useful for adjusting the tension of the bobbin case, a high-quality sewing tool for household sewing machine repair tools. Sturdy, rust-proof, -, and long service life. Suitable for machine models: 4423 heavy duty, 4432 heavy duty, etc., specially designed for sewing machine maintenance, craft projects and home work. Compatible with for sewing machine models: Ambition 1.0, Ambition 1.5, Ambition Essential., Weight: 0.05070632026 Pounds, Manufacturer: Jaywool