Manufactured from hardened and heat treated Chrome Vanadium steel with a fully polished finish. Ball-End hex keys range in length from 65 to 175mm and in size from 1.5 to 10mm. TRX-Star* keys range in length from 65 to 175mm and in size from T10 to T50. Colour-coded anti-slip coating for comfort, control and fast identification. Supplied in EVA foam storage tray. One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. Manufactured from hardened and heat treated Chrome Vanadium steel with a fully polished finish. Ball-End hex keys range in length from 65 to 175mm and in size from 1.5 to 10mm. TRX-Star* keys range in length from 65 to 175mm and in size from T10 to T50. Colour-coded anti-slip coating for comfort, control and fast identification. Supplied in EVA Storage Tray. Lifetime guarantee*.