Craftsman 3/8 Dr 5 Locking Extension

Craftsman's 3/8 Dr 5 Locking Extension, model CMMT17812V, is a tool that I initially approached with both high expectations and a bit of skepticism. Marketed as a sturdy, reliable extension bar with a locking collar to ensure a secure fit, it seemed like the ideal addition to my toolbox, especially for tricky tasks such as working on spark plugs and plumbing jobs.

First Impressions

Out of the box, the extension bar has a solid feel to it. The full polish chrome finish is not only visually appealing, but it also promises rust and corrosion resistance, which is crucial for any tool that's going to be used regularly in varying environments. This sleek finish contributes to an overall impression of high quality and durability. At just 0.3 lbs and with a length of 7.9 inches, it’s lightweight and easy to handle, making it practical for prolonged use without causing fatigue.

Locking Mechanism

One of the standout features of this extension bar is its locking collar, designed to provide a secure fit for sockets. This is particularly useful when you’re working in tight spaces where losing a socket can be frustrating and time-consuming. The locking mechanism is straightforward to operate. It involves a small plastic slide switch that you push down to attach or remove a socket.

In practice, this mechanism works well. I tested it on a variety of sockets, and it held them firmly in place without any slippage. This gave me the confidence to work in more challenging conditions without worrying about the sockets coming off. However, I did notice a slight difference in the mechanism design compared to what was initially advertised. The product images showed a slide lever, but what I received had a push button. While the push button works adequately, it lacks the ‘springy’ action that I would have preferred for a more responsive and secure feel.

Performance in Action

I put the extension bar through its paces on a plumbing job where I needed to use crow foot wrenches. The locking mechanism proved invaluable in this context, as it ensured that the wrenches stayed firmly attached to the extension, allowing me to focus on the task at hand without constantly readjusting my tools. The extension bar performed exceptionally well, handling the torque required without any issues.

Switching gears to automotive work, I used the extension bar to work on spark plugs. This is where the tool truly shone. It allowed me to reach into the engine bay and secure sockets in place, preventing them from falling off. This made the job significantly easier and quicker. The locking feature was particularly useful when pulling out the socket, as it ensured that the socket didn’t remain stuck in the spark plug hole.

Build Quality and Durability

Craftsman has a reputation for producing durable tools, and this extension bar is no exception. The full polish chrome finish not only looks great but also adds a layer of protection against the elements. After several uses in different environments, the extension bar showed no signs of rust or corrosion. The steel construction feels robust and capable of withstanding the rigors of regular use.

Minor Drawbacks

While the overall performance of the tool is commendable, there are a few minor drawbacks worth mentioning. Firstly, the plastic slide switch, although effective, feels a bit flimsy. I’m concerned about its long-term durability, especially if the tool is used in dirty or greasy conditions where the switch might become sticky or less responsive. Additionally, the discrepancy between the advertised slide lever and the received push button mechanism could be confusing for some users. This inconsistency suggests a need for better quality control or updated product descriptions to manage customer expectations.

Ease of Use

Despite these minor issues, the extension bar is user-friendly. The locking mechanism, once understood, is simple to operate and significantly enhances the functionality of the tool. It’s particularly handy for novices or DIY enthusiasts who might not have the same level of experience as professional mechanics. The lightweight design and comfortable grip make it easy to maneuver, even in tight spaces.

Warranty

One of the major selling points of this tool is its full lifetime warranty. This offers peace of mind, knowing that Craftsman stands behind the quality and durability of their product. Should any issues arise, the warranty ensures that you’re covered, which is a significant advantage over other brands that might only offer limited warranties.

Final Thoughts

Overall, the Craftsman 3/8 Dr 5 Locking Extension is a valuable addition to any toolbox. Its robust construction, effective locking mechanism, and user-friendly design make it a reliable tool for a variety of tasks, from automotive to plumbing. While there are minor concerns regarding the plastic locking switch and the inconsistency in the mechanism design, these do not significantly detract from the tool’s overall performance.

I would recommend this tool to both professional mechanics and DIY enthusiasts. Its ability to securely lock sockets in place can save time and frustration, particularly when working in tight or difficult-to-reach areas. The full lifetime warranty further adds to its appeal, ensuring that this tool will be a reliable companion for years to come.