Faithfull Professional quality hexagon keys made from fully hardened chrome vanadium steel. All keys from 4mm (5/32in) have chamfered edges to prevent damage to blade and fittings. All keys 3mm (1/8in) and above are marked with their size.Select Option 0.035 A/F0.050 A/F1/16 A/F1/2 A/F1/4 A/F1/8 A/F3/16 A/F3/32 A/F3/4 A/F3/8 A/F5/16 A/F5/32 A/F5/64 A/F5/8 A/F7/16 A/F7/32 A/F7/64 A/F9/16 A/F9/64 A/F Add to Basket Quantity