Here’s everything included in the set… Metric sockets: SAE sockets: Accessories: • One 3-inch 3/8-inch drive extension bar • One 6-inch 3/8-inch drive extension bar • One 1/4-inch drive ...

When shopping for ratchets and socket sets, there are a few important factors to consider. One is metric vs. imperial, and again, metric is probably the better choice in the 21st century.