With the Metabo Futuro Top keyless chuck, you change cylindrical drill bits from 1 to 13 mm quickly by hand without using a separate key. You eliminate tool downtime caused by misplaced keys and keep work moving smoothly in the workshop and on the jobsite. The integrated spring-loaded mechanism provides a firm, secure grip even under heavy loads and during hammer drilling. Featuring a 1/2"-20 unf female thread connection, this impact-proof chuck is built for clockwise rotating machines. a durable rubber bellows reliably protects the internal thread and components from abrasive drilling dust and debris.