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Another name for these hand tools is a ratchet drill. Ratchets are used for tightening or loosening screws and nuts. Their special advantage is the ratchet function. This replaces the tedious follow-up and continuous rotary motion when tightening or loosening screws, which is required when using wrenches. This enables faster work, even with limited working space. In hard to reach places, extension pieces help so that screws or nuts can be accessed using the ratchet. In the field of electronics, ratchets are often used during the assembly of housings.