Folding Hexagon Key Set, 9 Piece (5/64 - 1/4in) This Faithfull Folding Hexagon Key Set contains a selection of short arm, ball end keys in a soft-grip non-slip storage case. Professional quality keys made from fully hardened chrome vanadium steel. All keys from 4mm have chamfered edges to prevent damage to the blade and fittings. Designed to avoid the inconvenience of lost keys. Imperial Sizes: 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4 A/F