LIFETIME WARRANTY: We provide an unlimited warranty unless the maximum warranty period is reduced due to national regulatory provisions in individual countries. 100% Swiss Made: For over 140 years, we have been developing and manufacturing the entire range of high-quality tools in Switzerland. This allows us to ensure the high quality of the products. Special alloy spring steel: Particularly high hardness values (58-60 HRC) and unique toughness and spring properties characterise this wear-resistant special steel - specially developed for us. Ball head shape: the perfectly shaped ball head allows you to screw on hard-to-reach surfaces up to a 30° angle. The precisely broken edges allow a secure hold in the screw. QUICK IDENTIFICATION Our Rainbow ColorCode ensures quick and easy recognition of the correct size of our hand tools. So you have the right Allen key ready in everyday life and save valuable time.