The SINGER ProSeries self-locking tweezers are a necessity to any sewing machine toolkit. The self-locking mechanism holds securely to an object, giving you hands-free ability when pulling out lint and dust. An angled fine tip gets into tight spaces with ease and allows for precision pickup. The ergonomic cushioned grips provide comfort and the ability to work with them for longer periods of time than standard all-steel tweezers. These tweezers are made of steel.