High quality material : The watchmaker tools are made of alloy steel which has good rust and corrosion resistance, so it is more durable and can be used for a long time.

Safe Use : Compared with the traditional way of repairing, the use of watchmaker tools is safer with less chance of hurting your hands.

Different size chuck : There are six chucks with different sizes(NO.0 φ18.50mm, NO.1φ20.20mm, NO.2 φ22.50mm, NO.3φ26.50mm, NO.4φ28.30mm, NO.5φ29.50mm) for you to choose in the enclosed package, you can open different sizes of cases.