Faithfull professional quality keys made from fully hardened chrome vanadium steel. All keys from 4 mm have chamfered edges to prevent damage to blade and fittings. The clip case storage container ensures that the key set can be safely stored in clothing pockets and toolboxes. The key sizes are clearly shown on the clip.8 Piece Set (Short Arm) Sizes. 1/16, 5/64, 3/32, 1/8, 5/32, 3/16, 7/32, 1/4in AF.