Manufactured from heat treated and hardened Chrome Vanadium steel with a fully polished finish. Keys range in length from 79mm to 230mm. Contents: 1.5, 2, 2.5, 3, 4, 5, 5.5, 6, 7, 8, 10mm. Anti-slip coating for comfort and control. Supplied in easy-access case with hanging tag for safe storage and quick key selection.