Using this 4 - Axis bike stem is easy. First, make sure your bike's handlebar diameter matches the 31.8mm bar clamp of the stem. Then, attach the stem securely to the handlebar and the bike's fork. You can adjust the stem easily to get your preferred riding position. When using, avoid over - tightening the bolts as it might damage the stem or the handlebar. For maintenance, regularly check the bolts for tightness. If you notice any signs of wear or damage, replace the stem. Keep it clean by wiping it with a dry cloth after riding in dirty or wet conditions.