Fasten bolts and screws securely by yourself with the help of the Bondhus Ball-End Hex Key Nine-Piece Set Metric Black Oxide. This product gets the job done even without professional help. This easy-to-use set of tools includes 9 different keys in sizes that range from 2mm to 1500mm. This black oxide metric allen key set is made with a special Bondhus ball-end design that enables off-axis usage. Each piece is precisely made for a smooth and reliable fit. This model features a solid forged steel construction making it a long-lasting tool that is resistant to bending from serious and constant use. The Bondhus hex key set is used by both DIY-ers and professionals.