- One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. - Manufactured from heat treated and hardened Chrome Vanadium steel with satin chrome finish. - Keys range in length from 79mm to 180mm and in size from 1.5mm to 10mm. - Supplied in easy-access case with hanging tag for safe storage and quick key selection. - Contents: 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10mm. - Lifetime guarantee*.