Hex key set, Standard key style, short, metric, 9 Piece. Includes 7 hex keys. Size Range: 1.5 - 10 mm. Plastic holders organize hex keys securely in place. Keys are black oxide finish. Holders are color coded, red for fractional and blue for metric. Ball hex key ends are designed with ball on long arm to provide 36° of rotation at up to a 3° angle.