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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.
| Type | Standard |
| Size | 3/8in a/f |
| Key Type | Standard |
| MFR Part No. | FAIHK38 |
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