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Allen wrenches go by different names: allen keys, hex keys, and hex wrenches. They prove quite helpful for automotive hand tools as well as DIY projects.
Today's motorcycles and vehicles commonly use allen bolts or hex-head bolts to secure casings or other small parts. Other automotive tools, such as screwdrivers, can't remove these types of bolts and may not be successful even with the help of an impact wrench. Allen wrenches have become popular hand tools among mechanics for their simplicity, size, and ease of use. Allen wrenches are helpful in terms of inserting a screw into a hole that can be hard to reach, and they are effective at working with small parts. Consider buying a set of allen wrenches if you need a number of sizes to accommodate different jobs.